Pilot Communications SPM93 - Relay Control (Function Code 05 H)

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9.3.3 Relay Control (Function Code 05H)
Use 05 command to control the relay. Relays are addressed starting at 0: relay 1 is
addressed as 0.
The requested ON/OFF relay is specified by a constant in the data field.
Data Field is 0xFF00, request the relay to be ON.
Data Field is 0x0000, request the relay to be OFF.
All other values are illegal and will not affect the relay.
Request Packet
(Master→DFPM93)
Response Packet
(DFPM93→Master)
Unit ID/ Slave address
1 byte
Unit ID/ Slave address
1 byte
05 H (Function Code)
1 byte
05 H (Function Code)
1 byte
Start register address
2 bytes
Start register address
2 bytes
Data field
FF
Data field
FF
Data field
00
Data field
00
CRC check code
2 bytes
CRC check code
2 bytes