Instruction Manual

bits 5 3
Function Length
• Function: Modbus function code
• Length: this frame payload length, unit is words or bits depend on function code
bits 4 4
Transactions Return
• Transactions: device transactions index
• Return: if return is 1, representing Modbus protocol is timeout
Downlink
Modbus Transactions Set
WSW2C00015 can set Modbus transaction from remote.
Bytes 1 1 1 2 2 1
Tran En ID Addr Poll FL
• Tran: A number representing index of Modbus transactions, can be 1 ~ 6
• En: Representing whether Modbus transactions is enable or disable, can be 1 or 0
• ID: Representing slave ID used for Modbus transactions, can be 1 ~ 247 or 255
• Addr: Representing slave address used for Modbus transactions, can be 1 ~ 65535
• Poll: Representing polling interval time, can be 1 ~ 65535, unit is 10 secs
• FL: Function code and payload length
bits 5 3
Function Length
• Modbus function code, can be 1 ~ 4
• Length: Representing read length used for Modbus transactions , can be 1 ~ 32 (FC is 1 or 2)
and 1 ~ 23 (FC is 3 or 4)
Modbus Write
Bytes 1 1 2 Not Fixed (1-46)
ID FC Addr Payload
• ID: Modbus slave ID
• FC: Function code, can be 5 or 6
• Addr: Modbus slave address
• Payload: Write Data