Mini8 Multi-loop Controller

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Eurotherm Business Group

Mini 8 – What is it?

•Multi-loop(4,8,16) PID controller

•8-32 Channel data acquisition

•Design targeted at economic multi-loop control

•However its feature set = 16 loop 3500

>Can satisfy demanding applications

•Open communications to PLCs/PCs

•Small compact unit

>125W x 105H x 125D

>DIN rail or bulkhead mounting

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Eurotherm Business Group

Basic Options • Power Supply

>18Vdc to 28Vdc• Standard I/O

>2off 24Vdc digital input>2off Change-over relays, rated 1A, 42V max

• Communications>Modbus RTU, 3 or 5-wire EIA485>DeviceNet>Profibus DP>Ethernet, Modbus TCP>CANopen>Additional Modbus RTU EIA232 for config/network

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Eurotherm Business Group

Input & Output Modules• 4 I/O slots

>Modules can be changed by technician

• 4 or 8 Ch.TC input

>Range –77mV to +77mV

>Any TC input, linear mV/mA with scaling, custom download

>42Vac/dc channel-channel isolation

>Max 4 per Mini8

• 4 Ch. RTD input

>Max 4 per Mini8

>2, 3 or 4-wire, Linear mV/mA with scaling

>42Vac/dc channel-channel isolation

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Eurotherm Business Group

Input & Output Modules• 8 Ch. digital Input

>24Vdc input>42 Vac/dc channel-channel isolation>Max 4 per Mini8

• 8 Ch. logic output>OnOff or time proportioned>42 Vac/dc isolation to system, no channel isolation>Max 4 per Mini8

• 8 Ch. relay output>OnOff or time proportioned>264 Vac channel-channel isolation>Max 2 per Mini8, slots 2 & 3

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Eurotherm Business Group

Input & Output Modules

• 3 Ch. current transformer input

>0-50mA ac current

>8 loops heater failure detection

>Isolation by CTs

>Max 1 per Mini8, supports 8 loops

• 4 or 8 Ch. mA output

>0-20mA/4-20mA

>Max 360R load

>42Vac/dc channel-channel isolation

>Max 1 per Mini8, slot 4 only

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Eurotherm Business Group

Control Options

• 4, 8 or 16 Control loops>PID, ON/OFF>Dual channel OP (heat/cool)

• Advanced control features>Similar functions to 3500>Flexible wiring of function blocks

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Eurotherm Business Group

Heater Failure Detection•Partial load failure, over current, SSR short/open circuit

>Rapid indication of fault•Automatic load cycling algorithm for up to 8-loops

>Selectable cycle time: 1s-60s>Sequentially tests each heater in turn

•Auto or manual commissioning•Refer to technical note AP1007 for more info

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Eurotherm Business Group

Setpoint Programmer•8 Programmers

>Each programmer has 1x16 segment profile>Profile SP can be wired to multiple loops>8 Profiled SPs are possible>8 Event outputs per profile

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Eurotherm Business Group

Maths, Logic and Timing Functions•Maths functions

>2 input x 24 >8 input multiplexor x 4>User value x 32>Multiple input x 4

•Logic functions>2 input x 24>8 input x 8

•Timing functions>Real time clock>Timer x 8>Counter x 2>Totaliser x 2

•Other functions include>Custom Linearisation x 2>Switchover>Plus others

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Eurotherm Business Group

Recipes•8 Sets, each set can a given meaningful name•24 Tags(parameters) per set•Typical example of Tags; Control SPs, Alarm

SPs, PID values etc

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Eurotherm Business Group

Plastics Application(EC8)•Standard configuration for use with VT505 or

Specview>8 PID loops

-TC input, Logic heat/cool outputs>Heater failure detection for 8 loops>Alarm management>Recipes

• Ideal for>Extrusion>Injection moulding>Thermoforming>Auxiliary equipment

-Chillers, dryers etc

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Eurotherm Business Group

Runtime SCADA with Specview•Compatible with EC8 configuration

•Mimics, recipes, alarms, trending, history

•Runtime supplied free on CD with Mini8

•Can upgrade to Full Specview