GE Multilin F650 Digital Bay Controller B-13
APPENDIX B B.1 MODBUS PROTOCOL FOR 650
B
B.1.5 OUTPUT WRITING
Relay contacts writing in the I/O boards are thought to make easy wiring checks. Proceeding as with a file access, with
opening, writing and lockout.
If it is a writing to a mixed board (includes 16 inputs and 8 outputs):
1º.- OPEN FILE OF OUTPUTS: writing msg to 0xFE20 of 3 registers with the name: OUTPUT
2º. - DESIRED OUTPUTS WRITING writing message to 0xFF20 of 5 REGISTERS, the first one is the board number
(0 or 1) and the restraint ones are the bytes of bits (bits are grouped byte to byte).
3º.- CLOSE FILE OF OUTPUTS: writing msg to 0xFE 28 of 3 registers with the name: OUTPUT
Example, activate the two lower relays to board ‘0’:
1
st
Opening
[0xFE 0x10 0xFE 0x20 0x00 0x03 0x06 0x4F 0x55 0x54 0x50 0x55 0x54 0xA8 0x42] ---------> RELAY
O U T P U T
PC <---------[0xFE 0x10 0xFE 0x20 0x00 0x03 0xA4 0x25]
2
nd
Writing
[0xFE 0x10 0xFF 0x20 0x00 0x05 0x0A 0x00 0x00 0x03 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x0000 0x03
0xAE 0x8D] ---------> RELAY
PC <--------- [0xFE 0x10 0xFF 0x20 0x00 0x05 0x25 0xDB]
3
th
Lockout:
[0xFE 0x10 0xFE 0x28 0x00 0x03 0x06 0x4F 0x55 0x54 0x50 0x55 0x54 0x29 0xA8] ---------> RELAY
PC <--------- [0xFE 0x10 0xFE 0x28 0x00 0x03 0x25 0xE7]
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