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Modbus connected but not receiving data on IOT2050

2/17/2025 11:49 AM	Rate (0)
AutoGen_5428156 Joined: 1/27/2025 Last visit: 11/25/2025 Posts: 1 Rating: (0)	Hi I'm currently trying to read out some data from a generator through modbus on an IOT2050 through it's DB9 COM port. When I try to check the serial ports through the attached images command I see that it is connected to a device and sending data but not receiving any. Any idea what I could be doing wrong? Thanks in advance Attachment 00ECEF95-7107-4586-BE51-D86AF08A5656.png (225 Downloads)

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2/26/2025 1:44 PM	Rate (0)
udae Joined: 3/12/2024 Last visit: 12/19/2025 Posts: 230 Rating: (7)	Hey, I would highly recommend you to have a look into our SIMATICmeetsLinux Serial-Modbus-Connection Example as there are all necessary configurations mentioned. Independent of this: Verify a correct Baud rate, Parity, Stop Bits and Data Bits Verify that TX is connected to RX on the other device Confirm that A(+) and B(-) lines are not swapped Confirm that the termination resistors are enabled BR

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