14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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EPICS Support for G3/FlexIO/PLC5/VSIOD8
Carl Lionberger
Group3™ optical-fiber-connected I/O
AB FlexIO™ I/O modules
More AB PLC5 record support
Janz VSIOD8 VME serial board
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Group3 control system
• VME-Based fiber-optic loop controller– 2 loops/VME bd, 8 bds/VME crate
• 16 DI’s (Device Interface) / loop– CNA – 2 AI, 1 AO, 8BI, 8BO
• Has PID (not supported)
– CN3 – CPU + 3 I/O boards• digital I/O, analog I/O, motor control
• Serial, gpib (not supported)
– Diagnostic Port on each DI
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Group3 controls in a rack
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Group3 EPICS support• CNA combination module
– Ai, ao, bi, bo, mbbi, mbbiD, mbbo, mbboD• B digital module
– bi, bo, mbbi, mbbiD, mbbo, mbboD• C 8 16-bit analog input – ai• D 8 12-bit analog output – ao• E 4-channel DC motor controller
– Mbbo for mode, ao for speed, accel• G 4-channel stepper – steppermotor record• H 4-channel encoder – ai, steppermotor record• F dual-serial, diagnostic port – vxWorks tty driver• Loop Controller (status) – ai, mbbi, mbbiD
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Cache Polling Loop
~30Hz
DI1
DI2
DI3
Loop Controller
input PV
Output PV
Device Support
drvG3
Sequence-number concurrency control
Per-DI semaphore protected
Interrupt IO Scan Queue
vxWorks tty driver
Group3 EPICS support
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Group3 Diagnostic Port
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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EPICS Allen-Bradley 1794 FlexIO Analog record and device support
• Analog support uses special record type for each module type– Similar to 1791 record written by Marty Kraimer– device supports allow ai and ao records to access the
special records. • Use dblink link type, like soft raw records• Status as well as data passed by using long to pass 16 bit data +
status• Support linear conversions
– Support 1794IE4XOE2, 1794IE8, 1794OE4, 1794IT8– Use cp and cpp link types to get automatic updates of
passive ao’s and ai’s.
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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FlexIO on a wall
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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FlexIO Combo module PV diagram
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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EPICS Allen-Bradley 1794 FlexIO Digital device support
• 1794IB16 and 1794IV16 – bi, mbbi, and mbbiDirect PV’s– standard AB binary device support
• AB 16-bit BI
• 1794OW8 – bo, mbbo, and mbbiDirect PV’s– Standard AB binary device support
• AB 8-bit BO
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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AbPlc5Record Allen-Bradley PLC-5 Record and Device Support
• Patterned on AbDCMRecord by Marty Kraimer– Special Record
• Each record does block transfer reads and/or writes to 1 or 2 files in PLC5
– Only 1 read file and 1 write file per record; can be same– Read-only, write-only, rw, init output from input
• Uses BTR and BTW pointers addressed by slot number in PLC– No supporting ladder logic programming necessary
– Device Support• Ai, Ao with or without conversion• Bi, bo, mbbi, mbbo, mbbiDirect, mbboDirect• Type flexibility • Supports interrupt I/O scanning
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Text
LINK
RACK
SLOT
Text
SV6008 Scanner
link n (in VME)
Group Module BTW Control BTR Control
1 0 BT19:4 BT19:0
1 1 BT19:1 BT19:2
2 0 BT19:3 BT19:4
PLC-5 Adapter Rack n
AB "Blue Hose"
RLEN FILE ELEM
64 20 0
64 21 0
64 21 0
64 22 0
Block Transfer Control File 19
0
1
2
3
64 23 04
File B21
0 16 bits
1 16 bits
2 16 bits
63 16 bits
....
16 bits3
INST_IO Link <Record name>[subscript]
Supported Standard Record
This example uses the same file for reading and writing.
AbPlc5 Record
subscript
Record Name
AbPlc5 Record Addressing
14 Nov 2000 G3/FlexIO/PLC5/VSIOD8 Carl Lionberger
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Janz VSIO-D8
• VMEBus 8 channel serial I/O– Uses Z8530 comm. controllers
• Baud to 38.4 k
• Not “intelligent”
– Serial ports either on front or back of crate– Bought source for vxWorks tty driver and
modified to do cts/rts flow control
