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MODBUS RTU / MODBUS TCP for Modulys GP 2.0 - ITYS PRO UPS - Masterys GP4 UPS - Masterys BC+ UPS range - Ref.: IOMXXXOPXX00-EN 00
11. APPENDIX 2: MODBUS TCP IDA SPECIFICATION
The frames below are only examples:
REQUEST FROM MASTER MODBUS TCP
Original frame: 01 03 1034 0003 40C5
Encapsulated frame: 0046 0000 0006 01 03 1034 0003
where:
0046 corresponds to the transaction number
0000 corresponds to the protocol identifier
0006 corresponds to the number of bytes (length of the message)
Note: the CRC is removed in the encapsulated MODBUS frame.
REPLY FROM THE UPS MODBUS TCP:
Original frame: 01 03 06 0002 0184 0000 1960
Encapsulated frame: 0046 0000 0009 01 03 06 0002 0184 0000
where:
0046 corresponds to the transaction number
0000 corresponds to the protocol identifier
0006 corresponds to the number of bytes (length of the message)
Note: the CRC is removed in the encapsulated MODBUS frame.
