What to do if Web HMI and Modbus/TCP program cannot access ICP DAS USA PET-7060 module through port 502?
- MMichael BarnesAug 4, 2025
If you can explore the web page through port 80 using a web browser, but the Web HMI and Modbus/TCP program cannot access the module through port 502, it might be because port 502 has been restricted by the firewall. In this case, you should consult your MIS administrator for assistance.