justinfromPA
Member
Hello, I am at customer site. The PLC is on and well, ie. no issues. The customer had to resplice a Devicenet cable not too long ago and the machine has not been working properly since. Right now, its set to communicate with a 1769-SDN/B AB PLC. I can see bits and high and low for Local 1: I.Data[1] through Local 1: I.Data[10]. I am not receiving any bits on the Data[0]. This is preventing the machine from running, since it doesn't recognize some Estops are good. I confirmed on the input card we see 120 VAC And the LED that indicates the input should be high is correct. All of the other Data bits seem to be fine, its just Data[0] that is not showing high properly. I am going to inspect the spliced cable soon, however im unsure how device net works exactly and if a bad cable somewhere in the network could impose problems somewhere else in the network. Any inisight on this would be appreciated, the machine is in a freezer