SM1280D for line 3 x 208V SM1280T for line 3 x 400V ... type YJ1600 (National) or PM60 (Panasonic)...

SM1280D for line 3 x 208VSM1280T for line 3 x 400VSM1280U for line 3 x 480V

SWITCHING POWER GENERATOR WITH EMBEDDED MICROCONTROLLER

FOR 6 KW MAGNETRON

TECHNICAL NOTE(issue September 2013)

SM 1280

File: SM1280_r5eng - Sept 2013 - Technical note: SM1280 page 1 of 26

SM 1280 SM 1280

(Cover Rear)


SM 1280 SM 1280

CE Declaration of ConformityDichiarazione di Conformità CE

Manufacturer’s Name: ALTER s.r.lNome del Costruttore:

Manufacturer’s Address: Via Curie, 8 - 42122 Reggio Emilia - ItalyIndirizzo del Costruttore:

Product Description: Power supply for microwave generatorDescrizione del Prodotto: Alimentatore per generatore di microonde

Product Name: SM1280 (power supply) and TMx66- TM060(microwave generator head)Nome del Prodotto: SM1280 (alimentatore elettrico) e TMx66 (generatore a distanza)

Model: SM1280D.xxx, SM1280T.xxx , SM1280U.xxx - TM066.xxx1 - TM060.xxx1 Modello:

The product described above is in conformity with the provision of the following European Directives:Il prodotto sopra descritto è in conformità con le seguenti Direttive Europee:

2006/95/CE Harmonisation of the laws of the member States relating to electrical equipment designed for use within certain voltage limits Riavvicinamento delle legislazioni degli Stati membri relative al materiale elettrico destinato ad essere adoperato entro taluni limiti di tensione

2004/108/CE Harmonisation of the laws of the member States relating to electromagnetic compatibility Riavvicinamento delle legislazioni degli Stati membri relative alla compatibilità elettromagnetica Conformity to the Directives is assured through the application of the following standards:La conformità alle Direttve è assicurata tramite l’applicazione dei seguenti standards:

Reference number Edition Description Numero di riferim Edizione Descrizione EN61010-1 2011-03 Safety requirements for electrical equipment for measurement, control and laboratory use Prescrizioni di sicurezza per apparecchi elettrici di misura, controllo e per utilizzo in laboratorio

EN61000-6-4 2007-11 Electromagnetic compatibility - Generic emission standard, industrial environment Compatibilità elettromagnetica - Norma generica sull’ emissione, ambiente industriale EN61000-6-2 2006-10 Electromagnetic compatibility - Generic immunity standard, industrial environment Compatibilità elettromagnetica - Norma generica sull’ immunità, ambiente industriale

Reggio Emilia, September 2013. Marco Garuti

General Manager

page 2 of 26 File: SM1280_r5eng - Sept 2013 - Technical note: SM1280

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Alter’ policy about Reduction on Hazardous Substances (RoHS) and Waste Electrical and Electronic Equipment (WEEE)

Law Reference• Directive 2002/96/EC of European Parliament (WEEE)• Directive 2002/95/EC of European Parliament (RoHS)• Decreto Legislativo D.L. n. 151 – 25/07/2005 (WEEE and RoHS)

At the present date 99% of components in our stock is RoHS compliant.The components still not compliant are hold in stock and still used because there is not the same or equivalent product RoHS compliant, or because the product is a spare part for equipment produced and put on market before 1st July 2006.

Alter Risk Assessment on RoHS

Of the six substances forbidden from electronic equipment (Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent Cromium (Cr-VI), Polybrominated biphenyls (PBB), Polybrominated diphenyl ethers (PBDE)) only two are used in Alter’s current manufacturing process, Pb and Cr-VI, of whose lead is the more important.

Cr-VI: No more used. May be present within the limit of 0,1% in weight as set by Directive.Lead: We are already using alternative alloys lead-free, but as we still have components that cannot be soldered

without lead, we have to use some lead-alloy for welding. We are putting any effort on reducing lead weight within 0,1% of products as set by Directive.

Important information to User about disposal, recycling, reuse of this electronic equipment at the end of its useful life (WEEE Directive).

According to Annex IA and IB of EC Directive 200/96/EC this equipment is not included on the list of categories/products covered by the Directive (as a matter of fact it does not perform a function alone, must be included into a larger process equipment and it’s for stationary use).Nevertheless we invite the User to respect the following Directive rules:

• this WEEE is not a municipal waste and should be collected separately according to rules of your country

• the symbol means that this WEEE cannot be disposal in the same place and in the same way like municipal waste

• this WEEE may present risk for environment as well as for person in case of disposal in unauthorized place, due to content of hazardous substances

• for disposal of this WEEE in unauthorized area the User may be charged with a fine or prosecuted by law.

Rev. Revision note Date File 0 First emission January 2009 SM1280_r01 Schematic diagrams corrected; alarm reset procedure added May 2009 SM1280_r12 CE declaration updated, new software release added December 2009 SM1280_r23 Application note reference AN 10290 October 2010 SM1280_r34 Software info added, TM060 v.1 head August 2012 SM1280_r45 New versions 20 (=1180) & 32 (RS485), logo update, removal int. schematic September 2013 SM1280_r5


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SM 1280 SM 1280

ContentsAAlarm troubleshooting 24, 25

BBit alarm table 19BUS operation 14

CCE Declaration 1Cleaning 8Components layout 21Components List 22, 23Conn.# 1 wiring vers. 0 - 1 - 2 -20-32: 16Conn.# 1 wiring vers. 50 - 51 17Conn.# 3, 4, 5 wiring 18Conn.# 6 wiring 19Conn. #8 wiring 14Conn. RS232 wiring 20Conn. #6 , 9, 10, 11 wiring vers. 32 20

EEnvironmental conditions 8Equipment installation 8Equipment ratings 9

FFirmware upgrade 12 Fuses replacement 6Fuses specifications 6

GGeneral description 4General information 3

HHandling instructions 9Handling warnings 4How to order 26

IInternal settings 13

MManual commands 11Meaning of ext. command vers. 0-2- 50 12Meaning of ext. command vers. 1-51 14Monitor signals 19

PPower-up procedure vers. 0 -2 -0-50 10Power-up procedure vers. 1 - 51 14

RRoHS conformity 2RS 485 version info (vers. 32) 15

TTechnical assistance 26

WWarnings 3Wiring instructions 9Working modes vers. 0 - 50 10Working modes Bus vers. 1 - 51 14Working modes vers. 2 -20-32 11

General InformationsThese equipment satisfies the European Standard EN 61010-1

With reference to EN 61010-1 standard, note:these power supplies must be installed and serviced only by qualified personnel.These power supplies must only be used by persons acquainted with the regulations covering the application.

The equipment described in this manual has been classified as industrial, scientific and medical (ISM) radio-frequency equip-ment and the related standard for the Electromagnetic distur-bance is the EN55011 (Industrial scientific and medical (ISM) radio-frequency equipment - Electromagnetic disturbance characteristics - Limits and methods of measurement.)

With reference to Basic Standard EN55011, these power supplies are included into Group 2 (Microwave generators, Thyristor command equipment, Welding equipment, Induction heating equipment or machine, Microwave industrial oven, etc.), Class A (industrial environment): for this reason these power supplies shall not be used in the residential, commercial and light-industrial environment.

The SM1280x and TMx6x, when properly installed, comply with the limits of radio disturbance characteristic of a Group2, Class A equipment as stated by EN55011.

A copy of the tests performed may be sent on request. Note that these tests cannot be used as a conformity certificate of the user’s final equipment.

WARNINGS

The SM1280 is powered by industrial main line and has high voltage output (close 8 kV): read carefully this manual before using. Be sure of correct connections and use.Failure to comply with the instructions enclosed in this manual may involve considerable risks for the staff respon-sible for checking and using the equipment, as well as the risk of general malfunctions of the equipment itself.


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SM 1280 SM 1280

Handling WarningsThe SM1280x has two handles on the front panel to help unpacking and handling operations: never use only the handles to lift the equipment but support the weight with an appropriate base on bottom!The handles do not withstand the off-center weight of the equipment (35 kg = 77 lbs).

General DescriptionThe SM1280x is able to supply the power required by a magnetron type YJ1600 (National) or PM60 (Panasonic) or H3881 (Hitachi) or AM3881 (Covimag), with nominal power of 6 kW @ 2.45 GHz. The output power can be adjusted continuously, from 10% up to 100%, using an external analog signal from 1 to 10Vdc, or by remote control, through filedbus interface or by front panel commands, depending from model. The standard model does not have any local command.

The unit, in addition to power the magnetron, has several features and commands to control and power the magnetron’s accessories.The SM1280x has been developed to power and monitor our remotable microwave head type TMx6x.The SM1280x unit may also be used to power microwave generators (heads) developed by others manufacturers under condition that they are electrically compatible: moreover it is mandatory to use our filament transformer FIL200 to guarantee a proper filament reduction curve. See the electrical specifica-tions of the unit on the next pages.The reduced height of the rack (only 7 HE, corresponding to 310 mm) allows to use small cabinet, even in big plant:

i.e. in a standard cabinet with an height of 2 meters, arranged to receive 19” racks, up to 5 SM1280x units may be easily installed.The user must provide a proper cooling flow: the cooling air enter into the unit from the front side, it passes through the internal circuits and components, then it goes out from the back. The intake air flow is approx. 200 m3/h.

The SM1280 is designed to be an alternative of the existing SM1180 serie, when is needed a network connectivity, not available on the previous model. The SM1280 is available in both European and Japanese/US voltages.The SM1280 carries new features mainly driven by the new CPU core and is offered in four versions:

- “Basic” version (vers. 0) has only one RS 232 standard port, which allows to drive/manage the unit with a simple software (like our “Front Panel” package distributed freely).

- “Bus” version (vers. 1) which implements an industrial bus interface like - CANopen or- Modbus/TCP or - Profibus, allowing connection of multiple devices on the same bus.

-”Display” version (vers. 2) includes front panel commands and LCD display as well as the features of the basic version.

- “Aux IN” version (vers. 50) has a separate connector for input of Auxiliary voltage which allows to manage safety shut-down of main power but keeping alive the unit’s CPU.See the final chapater “How to order” for more details and p/n.

SM1280 Range Overview

MODEL ABBREV. BASIC BUS DISPLAY AUX-IN Legacy 1180-300 RS485

Version no. 0 1 2 50 51 20 32

External Control (PLC) a possible a a a a a

LED Panel Indicators a a n.a. a n.a. a a

Local Commands (Manual) n.a. n.a. a n.a. n.a. n.a. a

Graphic Interface n.a. n.a. a n.a. n.a. n.a. a

Network Control n.a. a n.a. n.a. a n.a. RS485

RS 232 Control a n.a. a a n.a. n.a. n.a.

Separate Input for Aux Voltages n.a. n.a. n.a. a a n.a. n.a.

Firmware Upgrade a a a a a n.a. a


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Description of versions 0 - 1 - 50 -51

The front panel includes 5 status LEDs:

POWER ON (GREEN): ON when power is presentINTERLOCK ON (WHITE): ON when Interlock chain is closed (=OK)READY (YELLOW): ON when filament is ready (Preheating timer is elapsed) Flashing during preheating timeMICROWAVE ON (BLUE): ON when microwave is emitted (Enabling command is ON)ALARM (RED): ON when an alarm state is present.

The rear panel comprises the following (see drawings):

1) 7 pins socket for main supply (CONN #1) [male]2) 14 pins socket for mw head signals (CONN #4) [female]3) socket for the high voltage output (CONN #5) [female]4) 7 pins socket to power microwave head (CONN #3)[female]5) 25 pins “D” type socket for I/O signals (CONN #6) [female]6) RJ 45 on ETHERNET-MODBUS TCP interface, 9 pins “D” type socket for CANOPEN/PROFIBUS interface [only models with BUS interface, vers. 1 -51]7) 9 pins “D” type socket for RS232 port [female]8) fuse holders (F1, F2), screw type9) 3 pins socket for main supply (CONN #7) [male, only versions 50 - 51]10) equipment label11) BUS address switch [only models ves. 1 - 51]

WARNING!REFER SERVICE TO QUALIFIEDPERSONNEL ONLY.MAY PRESENT RISK OFELECTRICAL SHOCK INSIDE!

ACHTUNG!NUR FACHKRAFTE DIE WARTUNGMACHEN MUSSENMAN SICH EINEN SCHLOG HOLEN!

ATTENZIONE!LA MANUTENZIONE DEVE ESSEREFATTA DA PERSONALE QUALIFICATO.RISCHIO DI SCARICHE ELETTRICHEALL’INTERNO!

COLLEGARE ALLA TERRADEL GENERATORE REMOTO

VERBINDER DIRECT MIT DERERDUNG DES MIKROWELLEN GENERATOR

CONNECT DIRECTLY TO GROUNDOF MICROWAVE HEAD

12345678

90 12345678

90

BUS ADDRESSCONN #6

CONN #4CONN #3

CONN #1

CONN #8

CONN #2

CONN #7F1 F2

ATTENZIONE!USCITA ALTA TENSIONE

WARNING!HIGH VOLTAGE OUTPUTWARNUNG!HOCHSPANNUNGSAUSGANG

CONN #5RS 232

46PP01280

1

24

8

3

6

7 5 11

9

CURRENT

DATES/N

POWER

INPUT FREQ.

REGGIO E. - ITALYMODEL P/N

a retl

KVA

V

A

Hz

10

REAR PANEL versions 0 - 2







12345678

90 12345678

90

BUS ADDRESSCONN #6

CONN #4CONN #3

CONN #1

CONN #8

CONN #2

CONN #7F1 F2



CONN #5RS 232

46PP01280

1

24

8

3

6

7 5 11

CURRENT

DATES/N

POWER

INPUT FREQ.


a retl

KVA

V

A

Hz

10

REAR PANEL version 1

REAR PANEL versions 50 - 51

FRONT PANEL versions 0-1-50-51


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Description of versions 2 -20 -32

The front panel of the “Display version” (vers. 2), as well as that of vers. 20 (SM 1180-300 Legacy version) and that of version 32 (RS 485 version) includes a graphic display and manual commands.The unit can be driven manually through local commands (all these versions), alternatively via remote I/O discrete channels, via RS 232 serial port with our standard “FrontPanel” software (vers. 2 and 20 only). The RS 485 version (vers. 32) can be driven via its special interface and need a specific protocol (the only serial port available to communicate externally is the RS 485). See the relevant chapter “Equipment operation: User Interface” of version 2 on next pages.

FRONT PANEL version 2 - 20 -32


The version 20 is a direct replacement for older SM1180-300 (called also “Legacy 1180-300): there are several differences on wiring, the main is linked to the HV output [3]: the single pole standard is replaced with a 4 poles high voltage LH type

from AMP. Pls refer to the specific documentation for installa-tion and wiring of version 20.


The version 32 (RS 485 version) has two more “ sub-D” type connectors - 9 pins RS 485 serial port CONN #10 [12]- 15 pins CONN #11 [13] and other two have different meaning: see schematic page 20.

Pls refer to the specific documentation of version 32 for wiring and protocol commands via RS 485.

Fuses specifications (all versions)

The SM1280x has 2 fuses installed on the rear panel (look at the drawing on page 5, position 8): both fuses, labelled F1 and F2, protect the output line powering the remote head.A third fuse is on the main board M416, to protect internal control circuitry.

Fuse F1 and F2 specs:- Size, type: 10x38 mm, ceramic cartridge- Speed action: quick (F)- Rated current: 6 A - Rated voltage: 500 V

Fuse F1 specs on M416 board:- Size, type: 5x20 mm- Speed action: slow (T)- Rated current: 3,15A - Rated voltage: 250 V

SWITCHING POWER GENERATOR SM 1280

MAIN BREAKER

Esc

Enter

ADJUST


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SM 1280 Ratings & SpecificationsDescription Units Value Function NoteSM1280T: Line input nominal: Working voltage range Max Absolute voltage: Input Current, max:

VacVacVacArms

3x400360÷440

45018.5

Power input, 3 phase + GND

@400V input, full power

CONN #1, pin 2-3-7See wiring schematic

SM1280D: Line input nominal: Working voltage range Max Absolute voltage: Input Current, max:

VacVacVacArms

3x208185÷230

30030




SM1280U: Line input nominal: Working voltage range Max Absolute voltage: Input Current, max:

VacVacVacArms

3x480390÷570

60014.5




Transient Overvoltage Cat. II According IEC 664

Output power, max Wdc 8500 Electrical power to magnetron input

Electrical efficiency (Out/In) 92% Max heat to dissipate ~ 700 W

Output current range: mA 120÷1200 Adjustable range 10÷100%

Output current max: mA 1200 Limit in Power Control Mode With max amb temp. 40°C

Output voltage, max: Vdc 7800 Characteristic of magnetron Range 7.4÷7.8 kV

Output ripple, max ±4.5%@ 300 Hz±3% @ 40 kHz

Ripple in current at max power

Output linearity: Wdc ±15 Corresponding to ~ 10 Wrf

Output stability: 1% For input fluctuations within ±10%

Filament pre-heating time sec 15 Preheat filament at Power ON or after Hibernate is OFF

When done, READY signal is ON

Magnetron power:[Frequency]

kWMHz

6 [2450 ]

Typical: YJ1600, H3881, PM60, AM3881, E

Selectable filament backdown curve for the specific tube

Enabling signal, digital input: Vdc +24Range 5÷30

ON/OFF output & alarm resetInput Z: 4k7 kOhm

CONN #2, pin 4. To reset alarm hold OFF for 2 seconds

Response time to full power: msec 80 Linear time Using Enabling signal

Response time to switch OFF: msec 20 Using Enabling signal

Pulsability of output, min TON msec 100 Max power 6 kW, Freq= 5 Hz Using Enabling signal

Switch OFF time for alarm msec 3 Automatic shut-off

Reference signal, analog input: Vdc 1÷10 Power control 10÷100% CONN #6, pin 5. Ground pin 18.Input Z=50 kOhm, optoinsulated

Alarm contact, general:Contact rating: max voltage

max current:V

mA30500

OPEN: Alarm state or power OFF CLOSED: OK

CONN #6, pin 1-14

Alarm code, 4 bit contacts (0/1)Contact rating: max voltage

max currentV

mA30100

Inform type of alarm with emission of 4 bit codeSee relevant table

CONN #6, pin 8-21-9-22 (bit 0...3)Common pin 13

Ready contact:Contact rating: max voltage

max currentV

mA30500

CLOSED when filament is pre-heated & readyOPEN not ready filament or Alarm state

CONN #6, pin 12-24

Hibernate signal, digital input: Vdc +24Range 5÷30

ON filament is hibernate. OFF or not used:filament heated

CONN #6, pin 11Z= 4k7 kOhm

Interlock contact: OPEN: Alarm, shut OFF outputs. CLOSED: OK

CONN #6, pin 10-23

Monitor signals, analog outputs (2): Vdc 0÷10 Monitors various parametersMax current: 10 mASee relevant schematic

CONN #6, pin 2-15 (1); pin 3-16 (2)Designed for receiver impedance >30 kOhm (for accuracy <1%)

Voltage output (internal generator) Vdc +24÷30 Auxiliary voltage genera-tor, unregulated, for user interface

CONN #6, pin 10, 20. Max current: 100 mA


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Equipment maintenance

CleaningCleaning of air inlet: verify once a month. In case you need to remove dust then proceed as follow:- remove main line from the unit- remove the cover- use pressurized air from inside to outside for short time: do not exceed or you may damage the fan- install the cover and then power-on again.

Fuses replacementTo replace the fuses on rear panel proceed as follow:- switch-off the unit, removing main line from the equip-ment;- unscrew fuseholder cap;- replace the fuse with a new one with the same electrical characteristics;- inspect also the fuseholder: if it’s oxidated or it has burned point then replace it;- install the fuseholder cap and screw tight.Internal fuse: - switch-off the unit, removing main line from the equip-ment- remove the unit cover, unscrewing the 6 screws on sides- locate the fuseholder on M416 pcb: push the cap then rotate it without any tool (gently!), pull up the cap and ins-pect the fuse;- replace the fuse with a new one with the same electrical characteristics- install the fuseholder cap: push it then rotate.- reassemble the unit cover, screwing the 6 screws on sides

Equipment installationThe SM1280x cannot operate on a bench: it must be instal-led into a proper cabinet like a commercial 19” standard enclosure. The equipment is intended for industrial use only, not for laboratory use, and user must respect the wiring norms and prescriptions as described into next paragraph (“Wiring instruction”).The equipment cannot operate cantilevered, it must be safely fixed inside a cabinet by means of screws on the front panel (which is provided with 4 holes) and supported by means of a proper frame on the bottom for, at least, 3/4 of the total depth.Usually two “L” shaped supports on each side of the equi-pment, having a dimension of mm 15(h) x 30(l) x 2 (thick) are suitable for that purpose. The rear side of the equipment must be protected by a fixed panel which can be removed only by means of tools or by a door with security micro-switch: when the door is opened the micro-switch must shut-off the main line. This safety precautions must be taken to avoid operations on rear fuses or on connectors while the unit is still powered.

Environmental & Physical Characteristics:Use: Indoor use only, within industrial

enclosure

Working temperature range 5÷40°C [41÷104°F], Min-Max ambient temperature

Altitude design criteria: for altitude up to 2.000 m

Working Humidity range 80% RH up to 31°C [88°F], decreasing linearly to 50% RH at 40°C [104°F]

Air cooling requirement, flow: m3/h 200 Input from front panel. Air clean from dust

Pollution degree: 2, complies with IEC 664

Total Weigth: kg 35 [77 lbs).

Rack Dimensions, Panel Width: Panel Heigth:

Length (Depth):

mm 480 [19”]mm 310 [12.2 “ - 7HE/U] mm 482 [19” ]


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Special attention must be taken on designing the cooling air flow in case of stacking several units into the same cabinet.Note that each equipment has its own fan which intake approx 200 m³/h: the outlet of the exhaust air is on rear panel, the inlets on the front panel.

When designing a board to house several units we recommend to adopt the following design criteria:1. use a standard 19” wide enclosure with a depth of 800 mm (32”);2. allow free intake of the cooling air from the front of the cabinet and exhaust air from back panel throu the top of the cabinet or the back side;3. in case of ambient air with high degree of dust and moisture, install a proper air conditioner; if you cannot do this, then you have to use suitable air filters and instruct the user about their cleaning;4. provide a separation between the air intake duct and the air outlets, in order to avoid air-recyrculating;

Handling instructionsThe equipment weight is 35 kg (77 lbs). Always lift from the bottom and use an adeguate rugged support to avoid personal injury and damage to equipment itself.In case of shipping, package with the original package or use a wooden case and a proper filler: movement of the equipment inside the package must be avoided.

Warning for handling: use handles only for help during installation. Never use handles to lift the rack: the handles don’t withstand the off-center weight of the rack!To lift always lean the rack over a proper supporting base.

Wiring instructionsThe SM1280 must be installed and serviced only by quali-fied personnel acquainted with the regulations covering the application. For safety operations the following rules must be adopted:

I) The equipment must be grounded through the connector #1 using pin 4 (see the wiring diagram at page 15, 16).II) Connect the ground screw on panel rear (indicated by “ground” symbol) directly to the remote microwave generator head by a separate yellow/green wire gauge 2.5 mm².III) The main supply must be provided through connector #1: connect phases according to schematic at page 15 & 16: the connector’s pins for model T & U can accept wires with gauge up to 4 mm²; the connector’s pins for model D can accept wires with gauge up to 10 mm²; Warning: this connector is not intended for live insertion of the unit: an external tripolar breaker must always be pro-vided, and the unit must be switched off before inserting/unplugging of the connector.

IV) The connector #4, with 14 pins, brings the head’s signals to the equipment. Use wires with max gauge of 1.5 mm², refer to wiring diagram at page 17.V) The connector #5 is the high voltage output and must be connected to magnetron’s cathode, usually marked with the symbol “FA” on the magnetron’s teminal. The voltage value is near -8 kV .Use a proper insulated cable with working voltage >10 kVdc and minimum gauge of 0.25 mm²; protect the wire with sheating (armoured if appropriate).Assemble the wire into plug according to professional rules. The reliability of the equipment starts from the h.v. connec-tions.ALTER may supply the HV cable with lenght on request.VI) The connector #3 provides the power supply for the filament transformer (usually located near the magnetron), the magnetron fan and a warning lamp. Use wires wih max gauge 1.5 mm². Refer to wiring diagram at page 17;VII) The “D” type female connector #6 has 25 pins and brings the I/O signals to the equipment. Refer to wiring diagram at page 18.VIII) The CONN# 8 is present only in version 1 and 51. The type of socket depends on the fieldbus interface: - RJ 45 on Ethernet-Modbus TCP - 9 pin “D” on CANopen/ProfibusIX) The “D” type female connector RS232 has 9 pins and it’s a standard serial port, that can be used to upgrade of the software from a PC, or to retrive internal data through FrontPanel GUI. Look the pin-out at page 14.X) The user must provide external cut-off device, to protect the SM1280 from short-citcuit and thermal runaway; this external protection device must also allow to switch-off the main line for maintenance operations.XI) The external circuit breaker must be a 3-poles current limi-ter breaker and must comply the norm EN61010-1.XII) The external circuit breaker must be in close proximity of the equipment and within easy reach of the operator.XIII) The external circuit breaker must be marked as the disconnecting device for the SM1280.XIV) The connector #1 must never be used as a switch-off device.

Failure to comply with these instructions may involve con-siderable risks for the staff responsible for checking and using the equipment, as well as the risk of general malfunc-tions of the equipment itself.


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Equipment operationwhen working with versions allowing External Control (vers 0 - 2 - 20 - 50)

Power-up procedure

Before powering-up the equipment, double check to have properly connected it, (look at the chapter “Wiring Instruction” for any doubt) then power on the unit through your external contactor.Once switched OFF wait at least two seconds before setting it ON again.

At power on the unit enters into a “BOOTLOADER” state for few seconds to allow firmware upgrade, then it goes imme-diately into “STAND-BY” and here waits until the “filament heating” is completed. If the unit is remotely driven, it is necessary to remove the default Hibernate command, that prevents the hardware from heating the filament.If any alarm is present, the units stops, and the filament is off. At the end of the heating cycle the unit enters in “READY” mode: the power supply may power the magnetron, which generates microwave, only when it will receive the enabling command. Any type of alarm forces the unit to exit from the “READY” state and enters it in “ALARM” state.In absence of alarms the power supply may be left in “Ready” continuously: when it receives the enabling command (ON) it enters into “RF-ON” state and generates output power, when the enabling command is removed (OFF) the unit comes back to “READY” state.

Working Modes(vers 0 - 50 only)

The behaviour of the SM1280x depends on its “working status”: it has several statuses with different meaning and functionality. The logic flow of these statuses is showed on the following drawing.These statuses are:

BOOTLOADER: it goes in this mode at power-on, waits for any serial firmware update data, and after a few seconds, the unit enters in Stand-By mode.

STAND-BY: it’s a waiting state, the unit is powered but not ready as the magnetron filament is not powered; all the working parameters can be setted from Operator Panel; the unit enters in Stand-By from the previous Bootloader state or when an alarm, or hibernate condition is true. The unit exits from Stand-by and goes to Preheating only if there aren’t alarms, the Interlock chain is closed and the HIBERNATE command is OFF.

PREHEATING: it’s a temporary state, driven by a timer, to allow the filament to be heated. The unit enters in this mode after a

STANDBY

PREHRUN

READY

HIBERNATE=0 &INTERLOCK=1 &ALARM=0

HIBERNATE=1 orINTERLOCK=0 orALARM=1

HIBERNATE=0 &INTERLOCK=1 &ALARM,=0 &TIME<15s


HIBERNATE=0 &INTERLOCK=1 &ALARM,=0 &TIME>15s

HIBERNATE=0 &INTERLOCK=1 &ALARM,=0 &ENABLE=1

HIBERNATE=0 &INTERLOCK=1 &ALARM,=0 &TIME>15s &ENABLE=0




BOOTLOADER

TIME>2S

remote command or automatically after the end of Bootloader state. When the timer is elapsed the unit goes in Ready mode.

READY: it’s a waiting state. The unit waits the enabling com-mand to generate power to the magnetron. The magnetron filament has been, and is properly heated. The unit may last in this state as long as needed: it exits auto-matically in case of alarm or when the ”Hibernate” command is asserted. It goes to next “MW-ON” status when the enabling command is set ON.

MW-ON: starts microwave emission at the presetted power level while the led “MW ON” is lighted up.The unit exits from this mode in case of:* the enabling command is set OFF: enters into Ready state, or* ALARM presence: the unit goes to Stand-by, or* the INTERLOCK chain is open: it goes to Stand-by again.* the Hibernate command is set to ON: jump to Stand-by.

Look at the status diagram for the working mode logic:


SM 1280


SM 1280 SM 1280

Working Modes (vers 2 -20 -32 only)

The “Display” versions have a graphic display, can be driven manually via the front panel controls. The status of the equipment and all the relevant information to the user are provided through the graphic display: the following layout describes the various pages, showed on the display, and their logical link:

At power ON the display shows initially the sof-tware release, then the unit starts the preheating of the filament: after 10 seconds, if no alarm is present, the unit enters in Ready state. If the hardware command “Power Enable” is active (ON) the unit starts to power the magnetron and microwaves are emitted from the head: the power

level is read (and driven) from the manual knob on the panel. Change from one state to another is similar to other version and the relevant information is showed on the display.

Manual Commands

On the front panel there are three push-buttons and one knob.ESC allows to swap from one page to another, TAB (the

button with the arrow) to scroll down the selection, ENTER to confirm the selection.The knob allows to modify a value when this is enabled.The manual commands are active only when the related option is enabled: if it is not then the unit can run only with External commands.

It’s the default page at Power ON. This view reports the sof-tware version and lasts only few seconds.

Second page, informing the unit is heating the magnetron’s filament: it lasts until the heating timer has finished, at least 10 seconds. No command is effective.If this page doesn’t show up, it means there is an alarm state active that forbid the preheating (a relevant message is displayed)

The filament is hot and no alarm is present: the unit is ready to power the microwave head. The lower row indicates the presetted value of output power.

The SM1280 is powering the microwave head at the % indica-ted on display.

Software Menu Description

This is the set-display submenu: it allows to select what to display. Options available: - % Output Power- Output Power of psu (W)- computed Microwave Power (W)

Example of selection to display Microwave Power

Example of selection to display all information at a glance


SM 1280


SM 1280 SM 1280

This is the set-mode submenu: it allows to select Manual or Exter-nal Control.In Manual mode the power can be adjusted using the panel knob. In External Control mode the manual commands are not effective.

This is the set-efficiency sub-menu: it allows to enter the estimated value of magnetron efficiency, range: 0-100% . If you select 100% the “Microwave Power” corresponds to the output power of the psu.

When the unit is in Alarm state the cause is displayed untill the alarm is removed.

The CPU drives the unit to obtain an electrical output power (Va * Ia) value proportional in a linear way to the reference input signal. The scaling is 850W/V.

INTERLOCK FUNCTION: managed throu CONN# 4, pin 5 - 6, “MICROSWITCH ON COVER”. It is an external hardware chain of contacts, that must be closed all at the time to have the internal relay closed. (ON condition). When in ON the CPU light-up the related Interlock OK led; in OFF state the led is Off and the unit goes in Stand-by, as all dangerous voltages on the head connector are off.

HEAD ENABLE 1, 2: CONN# 4, pin 7 - 9; CONN# 6, PIN 10 - 23 not implemented yet (version 1.0.1). Do not use, they have no meaning.

Firmware upgrade

The software stored on the CPU (firmware, on a flash memory) can be upgraded to a newer version using the RS232 serial port on the unit, connected to a PC.

Important remark: at power-on, even if a program is already stored, the microprocessor enters a “BOOTLOADER” status, lasting 2 seconds, during which it is possible to overwrite, through the serial RS232 port, the stored code.If no new code is loaded within 2 seconds, the previously stored one is run.

To upload a new program through the bootloader, simply connect the SM1280 serial port to the PC serial port, using a 9 pin 1:1 cable (only TX, RX and Ground are used, but also a full cable will fit. See schematic on page 14) No external switch must be operated, and the unit does not start until the new program is stored, but be sure no enable signal is active when upgrading.

The upgrade of the firmware embedded in the SM1280 is released as a .zip archive named “program_name.zip”.Unpacking the .zip archive you generate:- a directory named “program_name” containing the micro code to be loaded, - an executable program named “SendApplicationProgram.bat”- and the loader “sRecLoad.exe”.

Once unpacked the .zip program- enter in the folder “program_name”, - switch-on the SM1280- run whithin 2 seconds the program “SendApplicationProgra-m.bat” (which launches sRecLoad.exe application)(This is the maximum time that the microprocessor bootloader waits for new code to be loaded).

During the bootloader wait time, the red ALARM led is on: if no code is sent, then the previous code is executed, and it is not possible to change it without switching the unit off.

Meaning of external commands.(vers 0 - 2 - 20 - 50)

HIBERNATE: has value ON/OFF. If ON the magnetron’s filament is not powered and the SM1280 goes into Stand-by mode.In OFF the unit makes filament heating and, when the related timer is elapsed, enters in Ready mode. If a user don’t like to use the Hibernate function, he may not connect the HIBERNATE control signal: the system then detect it as in OFF condition.

POWER ENABLE: has value ON/OFF, but its effect is related also with the Hibernate command as follow:a) in OFF state - and HIBERNATE is OFF - the unit performs filament preheating and goes in Ready mode but does not generate output power, even if the reference signal is >0;b) in OFF state - and HIBERNATE is ON - the unit is in Stand-by mode but does not generate output power, even if the reference signal is >0;c) in ON state - and HIBERNATE is OFF - the unit waits the end of preheating timer, if not yet elapsed, then starts to gene-rate output power;d) in ON state - and HIBERNATE is ON - the unit is in Stand-by mode but does not generate output power, even if the reference signal is >0.

POWER SET: it’s an analog input value and has the meaning of “desired percent” of the full output power (8500W)When this value is lower than 1Vdc the unit does not gene-rate any output power, when >1Vdc the unit generates power proportional to this signal value.


SM 1280


SM 1280 SM 1280

In case the program sRecLoad.exe sends data whithin 2 seconds, the microprocessor bootloader stores the new data on the internal flash memory, installing the new release, and automatically executes it when the download is done.

Internal settingsThe SM1280x comes in the default settings, and no setting is required; nevertheless some working parameters can be modifyed using internal dip-switches.WARNING: dangerous voltages are present inside the unit,only trained personal can modify internal settings.Always switch-off the unit before opening any panel, and leave at least one minute

DIP-SWITCH #1 (on board M416.x): allows to override some external alarms, as follow

SW1-1 if set to ON disables ARC DETECTOR alarm.SW1-2 if set to ON disables MAGNETRON THERMAL alarmSW1-3 if set to ON disables AIR FLOW alarmSW1-4 if set to ON disables H2O FLOW alarmSW1-5 if set to ON disables INTERLOCK inputSW1-6 if set to ON disables MICRO CARTER alarmSW1-7 if set to ON inhibits the automatic opening of the interlock relay from the CPU in case of alarm. If it is ON, only the opening of the MICRO CARTER switch can de-energize the interlock relay, cutting in this way the power to the head and leaving the head in a safe condition.SW1-8 – not used.

SW2

NORMAL OP.HARDWARE

FIXED

TESTFIELDBUS

PM60H3881

ON OFF

ON OFF ON OFF ON OFF

YJ1600

ON OFF

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CPU POWER

HEAD INTERFACE POWER

PLC INTERFACE POWERING

HEAD INTERFACE (CONN#2)

HEAD POWER OUT (CONN#4)

230Vac BOARD POWER

LED BOARD

FIELDBUS INTERFACE

RS232 INTERFACE

M416.1 CONNECTORS, TEST-POINTS, LEDSTRIMMERS, DIP-SWITCHES, JUMPERS

DIP-SWITCH#2

DIP-SWITCH#1

FILAMENT VOLTAGE ADJ.

PTC ON HEATSINK

FAN POWER

DRIVER COMMAND

PARAMETERS SENSING

CONTROL I/O (CONN#5)

id32384187 pdfMachine by Broadgun Software - a great PDF writer! - a great PDF creator! - http://www.pdfmachine.com http://www.broadgun.com

DIP-SWITCH #2 (on board M416.x)

Switches 1 and 2 (SW2-1 and 2-2) select the type of filament cut-back curve according magnetron specs: see the following table.

SW2 - 2 SW2 - 1 Magnetron type 0 0 YJ1600 National0 1 H3881 Hitachi /

AM3881 Covimag1 0 PM60 Panasonic1 1 Filament fixed @5V

SW2-3 if set to OFF enables the external control of the unit, set to ON enables the fieldbus control.WARNING: in this case, if no fieldbus interface is present or if no communication is present on the bus, an alarm is generated.

SW2-4 must be set to OFF for normal operation, if set to ON enables the hardware test of the M416 board.WARNING: don’t enable this switch: the use is limited to trained personal only and for test purposes.

(DIP-SWITCH #1)


SM 1280


SM 1280 SM 1280

Equipment operation with versions having network capability

(vers 1 -51)

Power-up procedure

Before powering-up the equipment, double check to have properly connected it, (look at the chapter “Wiring Instruction” for any doubt) then power on the unit through your external contactor.Once switched OFF wait at least two seconds before setting it ON again.The OFF state, between two consecutive ON state, must last two seconds minimum.

Meaning of external commands (vers. 1-51)

With psu having network capability, like CANOpen (p/n ending xxxCAN) or Modbus/TCP (p/n .....MTCP) or Profibus (p/n......PROF) it’s mandatory to provide the physical signals of “Power Enable” and “Interlock” (see the schematic of the signals connector on next pages) otherwise the unit will not respond to any bus command.

POWER ENABLE: has value ON/OFF, in ON state the com-mands sent on the bus line are accepted and managed; in OFF state the external commands don’t have any effect.

INTERLOCK: it is an external hardware chain of contacts, that must be closed all at the time to have the internal relay closed. (ON condition). When in ON the CPU light-up the related Interlock OK led; in OFF state the led is Off and the unit goes in Stand-by, as all dangerous voltages on the head connector are off.

BUS operation

For protocol explanation refer to relevant Application Note:AN 10.290: Modbus/TCP Protocol for SM1280The working status for these versions is the same of other version (read the chapter “Working Modes” for version 0 at previous page): the status is then provided thru messages sent on the bus.

Each SM1280 unit, wired in a network bus, must be associated to a node address.There are several ways to set the device address, depending from the type of bus, but in general it can be set in hardware using the 2 rotary Dip Switches on the rear panel of the unit (pos. 11 in the next drw) , above CONN #8 (pos. 6, same drw).Looking at the panel the left switch sets the tens, the right sets the units.A value from 1 to 99 can be set, while node 00 is usually reserved and must not be used (consult the specific software documentation).

The bus is based on a network interface device named “AnyBus CompactCom”(*) manufactured by HMS Industrial Networks(**): for general information consult http://www.anybus.com. For specific document on the protocol and related technical information search for product type Anybus-CompactCom. I.e. a specific document on the Modbus/TCP protocol is 367-2973-ABCC-MTCP_IT_2_04.pdfNote:* AnyBus logo, HMS logo, AnyBus CompactCom name are register trademark of HMS Industrial Networks AB** HMS Industrial Networks AB, Stationsgatan 37, 302 45 HalmstadSweden

The bus connector (CONN. #8) may differ in style from bus type, but the LED associated have common meaning and functionality. In the next drawing is depicted the Modbus/TCP style (RJ45).







12345678

90 12345678

90

BUS ADDRESSCONN #6

CONN #4CONN #3

CONN #1

CONN #8

CONN #2

CONN #7F1 F2



CONN #5RS 232

46PP01280

1

24

8

3

6

7 5 11

CURRENT

DATES/N

POWER

INPUT FREQ.


a retl

KVA

V

A

Hz

10

LED State DescriptionOff No Power or no IP address

Green Module is in Process Active or Idle state

Green, flashing Waiting for connections

Red Duplicate IP address, or FATAL event

Red, flashing Process Active Timeout

Network Status LED: A test sequence is performed on this LED during startup

# Item

1 Network Status LED

2 Module Status LED

3 Link/Activity

4 Ethernet Interface

Module Status LED: A test sequence is performed on this LED during startupLED State DescriptionOff No Power

Green Normal operation

Red Major fault; module is in state EXCEPTION (or FATAL event)

Red, flashing Minor fault


SM 1280


SM 1280 SM 1280

Link/Activity LED:

LED State DescriptionOff No link, no activityGreen Link establishedGreen, flashing Activity

Each module is galvanically insulated. A standard “straight” Ethernet RJ45 cable can be used to establish a connection between SM1280 psu and the PC or HUB device. The ethernet interface supports 10/100Mbit, full or half duplex operation.

At Power ON the device does not activate any Process Timeout. This condition means that once the device has entered a “Process Active” state after the first command, if the MASTER stops to run (for any reason), the SM1280 power supply does not detect any abnormal situation and keep running the output in the state they were.

On contrary, if the Process Active TimeOut value (consult the software documentation for the specific bus) has been set to a value greater than zero, it stays in Process Active Status only if the MASTER continues to send related messages: once the MASTER stops sending correct messages, the power supply, at the end of “Process Active TimeOut” milliseconds, enters the IDLE state and switches OFF all the outputs (analog and digital). We strongly recommend to set the Process Active Timeout value.

A special software toolkit is available to support testing and development for Modbus/TCP and CanOpen applications: the product is sold separately from the power supply and is described on relevant Application Note AN80xx.

The toolkit provides a ready to use software for PC running Win based o.s. and an easy graphic interface to verify, change, enable the discrete I/O of the power supply.

RS 485 Operation (version 32)

The version 32 of SM1280 (“RS 485 version”) is a special version equipped with an interface (p/n 89282) that allows to drive the entire generator through serial protocol RS 485: the interface provide also connection to the Power Detector PPD.

For power-up the unit pls refer to procedures of all other versions with network capability.

The introduction of this interface has modified the connector layout with the introduction of some more “sub-D” type connectors and removal of others:

- CONN #2, 7, 8 are no more present- CONN #1, 3, 4, 5 remain unchanged: see related schematic equal for any other versions;- CONN #6 [5] (I/O Signals) has a modified pin-out: refer to specific schematic for version 32 at next pages- CONN #9 [7] (RS485 Interface), 10 [12] (Interlock), 11 [13] (PPD Interface) are new, present only in this version 32: see relevant schematic at page 20.

The layout of changes on rear panel is depicted in the following drawing (the external reference numbers are referenced in bracket [ ] in the above description):

With this vers. 32 is no more available the serial port RS 232, and consequently is no more possible to drive this unit by the RS232 protocol described in our Application Note AN 9330 (that remain valid for all other versions)

For the protocol to drive RS485 version there is specific documentation available.


SM 1280


SM 1280 SM 1280

Connector # 1 wiring (vers. 0 - 1 - 2 - 20 - 32)


SM 1280


SM 1280 SM 1280

Connector # 1 wiring (vers. 50 - 51)


SM 1280


SM 1280 SM 1280

Connector # 3,4,5 wiring (all versions)

1413

12

117

3

84

12



SM 1280


SM 1280 SM 1280

Connector # 6 wiring (all versions except 32)

MONITOR SIGNALSvalid for all versionsOn the “D” type CONN #6 there are two monitor signals, in the range 0 ÷ 10Vdc (pin 2 and pin 3, ground on pin 15 and 16 respectively).The meaning of the monitor signals can be changed only by remote inter-face; the default setting at power-on is “Magnetron Voltage & Current” .

*: from software version 1.03 the CPU “copies” on these monitors the incoming signals arriving from RD8400 amplifier, without making any linea-rization or changes; hence, the real meanings of the signal is linked to the meaning of the RD that could be calibrated differently (i.e. the reverse signal may be scaled 0-6000W).

Forward and Reverse Power Monitor

(if signals are availables)

Magnetron voltage and current Monitor

(default setting)CONN. #6

Forward Power * 10 V= 6000 W

Output Voltage Va

1 Vmon= 1000 V Pin #2

(return pin #15)

Reverse Power * 10 V= 3000 W

Output Current Ia 1 Vmon= 200 mA

Pin #3 (return pin #16)

Description BIT 3 [22]

BIT 2 [ 9]

BIT 1 [21]

BIT 0 [ 8]

No alarm 0 0 0 0

Magnetron Overtemperature 0 0 0 1

Rack Overtemperature 0 0 1 0

Arc Detection (on head) 0 0 1 1

Overcurrent 0 1 0 0

Overvoltage 0 1 0 1

Air Pressure Low (on head) 0 1 1 0

Water Flow Low (on head) 0 1 1 1

Interlock 1 0 0 0

Current Leakage on Ground 1 0 0 1

Rack Alarm 1 0 1 0

not implemented 1 0 1 1



Communication Interrupted 1 1 1 0

Bus Communication Failed 1 1 1 1

CODES TABLE OF ALARMSvalid for all versions (in brackets [ ] pin no.)


SM 1280


SM 1280 SM 1280


RS232 connector wiring(all versions except vers. 32)

RS485 connector #9 and wiring connectors #6,

#10, #11 for vers. 32 only

XX


SM 1280


SM 1280 SM 1280

COMPONENT LAYOUTVers 0-1-2-50-51


SM 1280


SM 1280 SM 1280

Component list (See drawing page 21)

SM1280 T/U Model D Model

Pos. Q.ty Description P/N SM

1280

T v.

0

SM

1280

T v.

1xxx

SM

1280

T v.

2

SM

1280

T v.

50

SM

1280

T v.

51xx

x

SM

1280

T v.

52

SM

1280

D v

.0

SM

1280

D v

.1xx

x

SM

1280

D v

.2

SM

1280

D v

.50

SM

1280

D v

.51x

xx

SM

1280

D v

.52

Note

1 1 CPU board M416 800000416/1280 a2 1 Driver board M311 800000311/1280T a3 1 Power board M408 800000408 a

41 Fan, 230V VE2GRE120/6221R a

1 Fan capacitor 2µF CR202A450 a5 1 LCD board M292 800000292/AC440 a a a a

6 1 LED board M417 800000417.0 a a a a a a a a

7 1 Magn. Breaker IA3RV1331/4DC10 a a a a a a

7 1 Magn. Breaker IA3RV1331/4FC10 a a a a a a

8 1 Aux contact IA3RV1901/1B a a a a a a

9 1 Main line filter FL50FCD10 a

10 1 Auxsiliary filter FLFN20601206 a a a a a a

11

1 3 pins Socket AMP/CPC MOCPC07/2060362 a a a a a a CONN#7

3 male pin AMP type XII 35A MOCPCX/0662614 a a a a a a CONN#7

1 3 pins Plug AMP/CPC (*) (**) a a a a a a PLUG#7

3 female pin type XII 35A (*) (**) a a a a a a PLUG#7

12

1 14 pins Socket AMP/CPC MOCPC14/1826411 a CONN#4

14 female pin AMP type III MOCPCX/1630881 a CONN#4

1 14 pins Plug AMP/CPC (*) (**) a PLUG#4

14 male pin AMP type III (*) (**) a PLUG#4

132 Panel Fuseholder FUP1892 a

2 Fuse 6A 500V 10x38mm FU10X38/6A a14 1 HV rectifier bridges pack 800000406.0 a

15 1 HV Transformer 42FT1280TB/DA a16 1 HV feedback board M305 800000305/1280 a

17 1 Capacitor board M307 800000307/1280D/T/U

a

181 HV connector GES HB31 MOHB31 a CONN#5

1 HV connector Plug GES HS31 (*) (**) MOHS31 a PLUG.#5

19 1 Optional control connector AMP/CPC (special version) MOCPC07/2060361

CONN.#2 (special)


SM 1280


SM 1280 SM 1280

SM1280 T/U Model D Model

Pos.Q.ty

Description P/N SM

1280

T v.

0

SM

1280

T v.

1xxx

SM

1280

T v.

2

SM

1280

T v.

50

SM

1280

T v.

51xx

x

SM

1280

T v.

52

SM

1280

D v

.0

SM

1280

D v

.1xx

x

SM

1280

D v

.2

SM

1280

D v

.50

SM

1280

D v

.51x

xx

SM

1280

D v

.52

Note

20


7 female pin AMP type III MOCPCX/1630881 a CONN#3

1 7 pins Plug AMP/CPC (*) (**)

a PLUG#3

7 male pin AMP type III (*) (**)

a PLUG#3

21


7

male pin AMP type XII 35A

MOCPCX/0662614 a a a a a a

CONN#1 male pin AMP type XII 60A

MOCPCX/1939914 a a a a a a

1 7 pins Plug AMP (*) (**) a PLUG #1

7female pin type XII 35A (*) a a a a a a

PLUG #1 pinsfemale pin type XII 60A

(**)a a a a a a

22 1 HV inductor a

23 1 LV inductor a

24 1 Current feedback board M302

800000302/1280 a

25 1 Air grid a

26 1 Field bus board M366 800000366.0 a a a a

271 Control connector DB25 MODFL25F a CONN#6

1 Control cable and header (*) (**)

a PLUG #6

281 RS232 interface connector

DB9MODFI09F a RS232

1 RS232 connection cable 1:1 (*) (**)

a PLUG RS232

29 1 Node Address selection board M419

800000419.0 a a a a

30 1 Line autotransformer 42ATT230/011 a

312 IGBT module T T S K M 1 0 0 /

GB125DNa a a a a a

2 IGBT module TTSKM195/GB066D a a a a a a

32 1 Bridge rectifier SKD6212 DDSKD6212 a

33 2 Handles a

Note: Components marked with (*) are included in the connector set p/n 44SET1280T/U to be ordered separately Components marked with (**) are included in the connector set p/n 44SET1280D to be ordered separately


SM 1280


SM 1280 SM 1280

ALARM TROUBLESHOOTING

Code Description Cause/Solution

01 Magnetron Over Temperature

a) Check water flow and incoming water temperatureb) Check magnetron thermoswitch (contact grounded=OK, open=alarm)c) Check setting of magnetron thermocouple: if latter isn’t present the alarm threshold must be set = 0d) Check air flow.e) Excess of reverse power. Reduce power,

02 Rack Over Temperature

a) Check for restrictions to the air flowb) Eliminate air recirculating between outlet on the sides and the rear inlet

03 Arc Detected

Electric arc in waveguide.If arc detector isn’t used, the related input must be grounded.If used, contact grounded=OK, open=alarmOn alarm, check waveguide and magnetron antenna status. Check Arc detector wiring.

04 Over Current

An excessive current has been detected, or a dangerous temperature is present into the unit.a) Check air flow blocks.b) Eliminate air reflow between side entry and rear output.c) A short circuit is present on H.V. cable: check wiring.

05 Over Voltage

a) The high voltage connection is openb) Magnetron may be modingc) The high voltage connectors are not fully inserted: if true check for h.v. spot discharge inside socket/plug: in case replace them.d) The filament is cold: check filament current with high voltage OFF (=enable signal OFF, h.v. connector #3 disconnected)Check filament transformer wiring and compliance.e) Verify preheating timer checking how many seconds require the “READY” led to become ON stable: if you feel too short try to enable the unit (= enable MW ON) only 10 seconds after enabling the filament (if the command is available) or after general power ON (when the filament command is always ON)f) check the filament timer (with the FrontPanel program from the PC): set >10 seconds.

As soon as an alarm is generated, the microwave output is immediately stopped, the alarm relay contact opened, the alarm code relay contacts set to the appropriate values, and the red LED on the unit panel is lighted (or if the LCD is present on the front-panel of the unit, a proper warning is displayed)Also the interlock relay is opened, and no voltage is routed to the head.When the cause of the alarm is removed, the red LED is

switched off, but the alarm condition is latched, and can be reset only removing the hardware ENABLE input for at least 2 seconds. As the filament has been shut down, the preheating time has to be waited after any alarm, before being ready to output microwaves again.The following table can help to locate and remove the alarm condition:


SM 1280


SM 1280 SM 1280

ALARM TROUBLESHOOTING

Code Description Cause/Solution

06Low Air

Pressurefrom head

If it isn’t used the related input must be grounded.If used, contact grounded=OK, open=alarmCheck head air filter.

07 Low Water Flowfrom head

If it isn’t used the related input must be grounded.If used, contact grounded=OK, open=alarmCheck head water flow.

08 Open Interlock Check interlocks on magnetron head assembly including waveguide. Check 25 pin D-Sub interlock

09 Current LeakageCheck Connector # 3 for signs of arcing: in case replace both socket & plug with new one.Check arcing on the magnetron head.in case replace the magnetron

10 Rack ErrorThe unit has detected an output current 10% lower than expected, usually due by a sudden drop of the main line voltage: check the main line

11 - Not implemented



14 Communication interrupted

The unit was running in “remote control mode” and the communication failed. Check:a) cable and connectors insertionb) remove any “suspend or low power mode” from yr PC (the OS may stops to drive the PC serial port)c) disable any screen saver from the PCd) do not move the FrontPanel window on yr desktop: some early version of operating system may stop driving the serial port.

15 No data transfer on fieldbus

The unit was running in “remote control mode” and the communication failed. Check:a) fieldbus cable and connectorsb) master device (PC or PLC) functionality.c) correct node addressing on SM1280


SM 1280

How to order

Power supplies: SM1280x.yyyjb, where:

x: D = input 3 x 208V T = input 3 x 400V U = input 3 x 480V

yyy: don’t care, it’s the code that we use to customize a unit;

j (version code): 0 or null: BASIC version 1 : BUS version followed by the

type of busb (bus type) MTCP= Modbus-TCP CAN= CANOpen PROF= Profibus 2: DISPLAY version with front panel commands 50: AUX IN version, has the input for auxiliary

voltage separated from power; other features like the basic

51: AUX IN version, has the input for auxiliary voltage separated from power input, with bus like version 1

20: (special) direct replacement for SM1180/300

32: (special) MKS custom development, drive thru RS485 interface

I.e.: SM1280T.ALT1CAN: input 400V, version with CAN bus interfaceSM1280T.ALT51CAN: input 400V, version with separate input for auxiliary voltage, with CAN bus interface

Alter reserves the right to improve or modify this products, at any time, without obligation to notify any person or entity of such changes.No part of this publication may be reproduced without the express written consent of Alter.

All rights reserved.

Technical Assistance:

Alter s.r.l42122 Reggio Emilia - ITALY

Tel: ++39 0522 553 820; fax ++39 0522 553 577Web: www.altersystem.com

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SM1280D for line 3 x 208V SM1280T for line 3 x 400V ... type YJ1600 (National) or PM60 (Panasonic)...

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