10/6/2023 11:21 AM | |
Joined: 9/3/2021 Last visit: 4/3/2024 Posts: 9 Rating: (0) |
Hello I need a little help reading a Modbus TCP signal on my Logo! I can see the data in registers 1 and 2 using Simply Modbus TCP Client Program but can't see the data on the Logo! Best regards Roy AttachmentTestModbus-2200-06102023-1.zip (293 Downloads) |
10/7/2023 3:10 PM | |
Joined: 9/3/2021 Last visit: 4/3/2024 Posts: 9 Rating: (0) |
Hi Thank you for getting back to me. The registers are 16-bit Integer They are supposed to be Big Endian. I'll probably be using 10 values Not sure of Offset I think 1st Register is Function 04 - 40001. I use a 40000 offset in Simply Modbus Program (See attached video) The Modbus device is a prototype CAN2 Bus to Modbus TCP Converter using ESP32 that someone has put together for me. Its IP Address is 192.168.0.120 I will attach Wireshark file to next answer Regards Attachment2023-10-07_16-40-17.zip (384 Downloads) |
10/7/2023 3:15 PM | |
Joined: 9/3/2021 Last visit: 4/3/2024 Posts: 9 Rating: (0) |
Hi Attached is the Wireshark File showing Connecting to the Modbus TCP device and requesting Function 4 Data - Registers 1 to 10 Hope this helps Regards AttachmentLogoModbusDemo.zip (373 Downloads) |
10/7/2023 3:45 PM | |
Joined: 12/18/2014 Last visit: 10/14/2024 Posts: 33954 Rating: (4221)
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That is not helpful. Please write from which device you will read the datas with a register table. |
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