06.06.2022, 18:22
Thank you admin,
the engineers of the device we want to connect can adjust the communication protocol for the convenience of LM....so there is no offiial documents.
We will ask if they can do with A/B and GND.
LM will be master, the device we want to connect will be the slave and the following is what they suggest as our protocol.
Interface RS-485(2 wires)
Protocol Modbus ASCI
Data rate 19200Bps
Data length 8bit
Parity None
Stop bit 1bit
Modbus ASCI will be structured by the following elements
Start Code : (3AH）
Slave Address Length 1byte
Function Code 1byte
Resister Address
Number of Resisters
LRC
End Code
We might need to calculate checksum.
Do you see any difficulity in LM composing message in this kind?
the engineers of the device we want to connect can adjust the communication protocol for the convenience of LM....so there is no offiial documents.
We will ask if they can do with A/B and GND.
LM will be master, the device we want to connect will be the slave and the following is what they suggest as our protocol.
Interface RS-485(2 wires)
Protocol Modbus ASCI
Data rate 19200Bps
Data length 8bit
Parity None
Stop bit 1bit
Modbus ASCI will be structured by the following elements
Start Code : (3AH）
Slave Address Length 1byte
Function Code 1byte
Resister Address
Number of Resisters
LRC
End Code
We might need to calculate checksum.
Do you see any difficulity in LM composing message in this kind?