Posted 3 Dec 2016 Dear sir, My problem is I connected with PLC with cable and uploaded the program and it's working nice, but when I removed my cable and connected the monitor panel it have communication error, I connect my PC again it won't see the PLC, the PLC functions I/O is work but I can't connect with PC or monitor panel. So if their any reset for communication port or the port is damage? Share this post Link to post Share on other sites
Posted 4 Dec 2016 What are you connecting your PC with? Ethernet or USB? What is model of the monitor panel and PLC? How are you connecting them? Share this post Link to post Share on other sites
Posted 4 Dec 2016 Dear Luke thanks for reply, the PLC is A1SH and connect with PC with SC09 cable. Share this post Link to post Share on other sites
Posted 5 Dec 2016 It's not possible to change the CPU communication settings. If you are using a laptop try without having your power cable connected just in case you have an ground loop. 1 person likes this Share this post Link to post Share on other sites
Posted 5 Dec 2016 The chances are you have damaged the communication port (seeing as the HMI wont connect either) Always better to power down the plc and screen before disconnecting and reconnecting. Probably too late for that advice. I'm not sure if you can get a plug in communication board for the A series plc. I rarely do that these days as I go through the screen in transparent mode Share this post Link to post Share on other sites
Posted 5 Dec 2016 Dear gambit thanks for your help, I want ask if this ground loop can damage the port. Share this post Link to post Share on other sites
Posted 5 Dec 2016 Dear Ron thanks for your advice, I think the port damage. But this PLC have only one main board and small one for switch and battery. But maybe their any protection on board I will send it to electronic lab. Share this post Link to post Share on other sites
