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WinCC Professional Modbus TCP/IP

Created by: umutorkan at: 10/27/2022 9:37 AM (6 Replies)

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10/27/2022 9:37 AM	Rate (0)
umutorkan Regular Member Joined: 10/20/2019 Last visit: 1/10/2025 Posts: 14 Rating: (0)	Hello, I've been trying to read holding registers of the schneider PM5300 via WinCC Professional Modbus TCP/IP without using any plc. I can not read the register of the device. I've checked the connection from WinCC Channel Diagnosis if there is problem with connections or not. There is no problem with connection. But I cant read the register when I start the simulation. So I tought I've written the HMI adress of the holding register. I am going to share the pics. Could you please help me. Best regards Attachment modbus.png (404 Downloads)

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10/27/2022 11:21 AM	Rate (0)
Cocolino Silver Member Joined: 4/8/2021 Last visit: 4/30/2025 Posts: 640 Rating: (113)	Hi umutorkan, To my knowledge, the configuration done seems to be ok, however, as far as I know, the parameter "Remote slave address" should be used only when there is a getway(bridge) between the HMI and the PLC. If that is not the case, it should be set to 255 o 0. Hope it helps.
	Best regards, Cocolino Don't forget to use the Rate Function if you find my answer useful :) THX :)
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10/27/2022 12:47 PM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 4/30/2025 Posts: 15403 Rating: (1897)	Hello Often the Modbus registers have a different definition in WinCC and other devices. do you have a chart or a description of the available Modbus register address areas of you plc? do you have checkd other registers and datatypes? Bye Murof
	If this Information really helps, you could use the Rate function
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10/27/2022 5:34 PM	Rate (0)
umutorkan Regular Member Joined: 10/20/2019 Last visit: 1/10/2025 Posts: 14 Rating: (0)	There is gateway setting in the device menu and I've defined both same gateway and subnetmusk. But it does not work

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10/27/2022 5:35 PM	Rate (0)
umutorkan Regular Member Joined: 10/20/2019 Last visit: 1/10/2025 Posts: 14 Rating: (0)	You can see the pic there is adress that I've been trying to read. Register 3026

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11/4/2022 10:14 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 4/30/2025 Posts: 15403 Rating: (1897)	Hello umutorkan yes but do you have tried to access other registers and datatypes? the connection seems to be OK (Channel Diagnosis shows OK) So I think its a matter of addressing Bye Murof
	If this Information really helps, you could use the Rate function
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11/21/2022 10:01 AM	Rate (0)
umutorkan Regular Member Joined: 10/20/2019 Last visit: 1/10/2025 Posts: 14 Rating: (0)	I've found the problem. When I don't change the remote slave address (I left it default setting) there is no problem with the communication thank you

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This contribution was helpful to 1 thankful Users Jen_Moderator

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