Dear Expert,

I need to connect WP231 module in ABB DCS system by Modbus RTU to read Gross/Net Weight( Holding Register 403014). Before connecting to the ABB modbus system. I have checked by Modbus Poll ,Qmodbus software but unable to read data. I have given jumper bewteen T+,D+' and T-,D-'. Set the Modbus parameters as slave 10,8E1  .

Please help me .

Dear Siwarexi,

Thank you for your quick response.

Yes I have set the Modbus parameter  as mention by Simatic panel.

Also same parameter set in Modbus master tool in my PC.

but CRC error come in QModbusMaster tool.

Waiting for your reply.

Dear Siwarexi,

Modbus address RTU:   10     in WP231.

I have used two differrent tool  QmodbusMaster and Modbus Poll.

Qmodbusmaster tool showing error :Invalid CRC

Modbus Poll tool showing error: write error, 

                                                   Read error: Parity error

                                                    Checksum error 

Dear Siwarexi,

After changing the baud rate to 19200 . it stablish the connection and data is coming.

Thank you for your help.