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Gross/Net Weight(403014) read from WP231 via Modbus RTU

Created by: fpramanik at: 9/20/2021 10:52 AM (6 Replies)

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9/20/2021 10:52 AM	Rate (0)
fpramanik Regular Member Joined: 10/4/2019 Last visit: 8/28/2023 Posts: 13 Rating: (1)	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 .

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9/20/2021 11:36 AM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 9/28/2023 Posts: 1061 Rating: (157)	Hello fpramanik, Did you also check the RS485 parameters into the WP231 module: - Is the Modbus RTU protocoll activated? - ... (See also the attached file, please.) Best regards Siwarexi Attachment Modbus_RTU.png (288 Downloads)

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9/20/2021 1:25 PM	Rate (0)
fpramanik Regular Member Joined: 10/4/2019 Last visit: 8/28/2023 Posts: 13 Rating: (1)	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.

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9/20/2021 3:32 PM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 9/28/2023 Posts: 1061 Rating: (157)	Hello fpramanik, Did you also pay attention to the Modbus address of the WP241 module? Best regards Siwarexi

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9/21/2021 5:56 AM	Rate (0)
fpramanik Regular Member Joined: 10/4/2019 Last visit: 8/28/2023 Posts: 13 Rating: (1)	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 Attachment Modbus Poll error.png (257 Downloads)

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9/21/2021 10:04 AM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 9/28/2023 Posts: 1061 Rating: (157)	Hello fpramanik, Do you receive any data into the ABB? Can you try to use the baudrate of 19200 for a test, please? Best regards Siwarexi

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9/23/2021 10:13 AM	Rate (0)
fpramanik Regular Member Joined: 10/4/2019 Last visit: 8/28/2023 Posts: 13 Rating: (1)	Dear Siwarexi, After changing the baud rate to 19200 . it stablish the connection and data is coming. Thank you for your help.

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