Hi guys, here's a little description of the issues I'm having.
This is not the first time I am using MODBUS to connect with devices, I do it very often. Any help would be appreciated!
I am trying to connect to a BTcino F41TMA energy meter through MODBUS. After various failed attempts to connect using a PLC I tried to connect the energy meter to a USB to RS485 converter directly with my Laptop. This allows me to manually send messages to any MODBUS device.
I input the parameters in the software to match those set on the device and started transmitting;
Address: 7
Baud Rate: 9600
Parity: None
Register Address: 4097
Function: 3
The result I got was [00], an ‘illegal response’.
I changed the Register address multiple times using: 96, 4096, 97, 4097, 100, 4100.
I also changed the Baud Rate on both the device and my laptop from 9600 to 19200.
The Function was also changed between 3 and 4.
Switching the Modbus wires or disconnecting the Modbus cable completely results in a ‘time-out’ and hence this led me to believe that the connection is in fact correct but the device seems to be returning an illegal response.
This link leads to screenshots of the software.
This link is for the MODBUS Table of the device.
Thank you,
Patrick
This is not the first time I am using MODBUS to connect with devices, I do it very often. Any help would be appreciated!
I am trying to connect to a BTcino F41TMA energy meter through MODBUS. After various failed attempts to connect using a PLC I tried to connect the energy meter to a USB to RS485 converter directly with my Laptop. This allows me to manually send messages to any MODBUS device.
I input the parameters in the software to match those set on the device and started transmitting;
Address: 7
Baud Rate: 9600
Parity: None
Register Address: 4097
Function: 3
The result I got was [00], an ‘illegal response’.
I changed the Register address multiple times using: 96, 4096, 97, 4097, 100, 4100.
I also changed the Baud Rate on both the device and my laptop from 9600 to 19200.
The Function was also changed between 3 and 4.
Switching the Modbus wires or disconnecting the Modbus cable completely results in a ‘time-out’ and hence this led me to believe that the connection is in fact correct but the device seems to be returning an illegal response.
This link leads to screenshots of the software.
This link is for the MODBUS Table of the device.
Thank you,
Patrick