Jmeadows7676
Member
I’m working on a problem where I’m getting a WatchDog error randomly between a PLC 5 DH+ channel and a DataLink DL4500 DH+ to Modbustcp device (Communicates to ABB 800x). The ABB controller has Bit 15 in Word N150:51 set to a 1. Once per scan If I see the bit is ON then I cut it back off and consider everything ok. If N150:51/15 stays off for 10 secs then I’m saying there is a Comms issue. Having said that I start doing some digging in the PLC 5 and see sometimes the N150:51/15 bit won’t come of for 6 to 8 secs, sometimes it’s less than a second. This lead me to putting my frontline Netdecoder software to work and found something I can’t explain. The DL4500 Device is doing a Write command for N150:51 4 words long when you look at the data parse out word 1 of the write has a value of 249 then sometimes is has a value of (33017) How can a integer be 33017 in a PLC 5?? I have some more work to do because my understanding was the ABB Conntroller was set up to always have a one in data point for N150:51/15. That doesn't seem to be the case with it sending a value of 249, But i dont know what the 33107 is at a 16 bit word. Any ideas???See screen shots
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