Vprakatoor Posted March 21, 2019 Report Share Posted March 21, 2019 Hi I have a Unistream with the following modules and positions UID-1600 @ 0 Di module UID-0016R @ 1 DO relay module UID-0402N @ 2 AI/AO module UID-0402N @ 3 AI/AO module I dont have any analog outputs on the UID-0402N modules, on one of the 0402N the 4-20ma signal coming in on channel 4 from a level transmitter randomly reads 0% for 2 mins and then comes back to actual level after that for 2 more minutes and then goes back to 0 for 2 mins and so on. while this is happening the display on the transmitter reads correct the whole time and the 4-20ma on the terminal blocks read fine(checked with meter). If i power cycle the UNIStream the problem gets fixed for a few days and then it starts up again. any help on this would be greatly appretiated. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted March 21, 2019 MVP 2021 Report Share Posted March 21, 2019 The first thing I would do is swap the two 402 modules and see if the problem moves. Quote Link to comment Share on other sites More sharing options...
Vprakatoor Posted March 21, 2019 Author Report Share Posted March 21, 2019 1 minute ago, Flex727 said: The first thing I would do is swap the two 402 modules and see if the problem moves. Hi Thanks for your reply, If i swap the modules and the wiring terminals, do i have to make any changes to the hardware configuration in unilogic? Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted March 21, 2019 MVP 2021 Report Share Posted March 21, 2019 No. Quote Link to comment Share on other sites More sharing options...
Vprakatoor Posted March 21, 2019 Author Report Share Posted March 21, 2019 1 minute ago, Flex727 said: No. Thank you, I will try this today but the problem is the event is random and happens every week, I dont have any way to force/simulate this issue so i wont know if it solved my problem for a week or so. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted March 21, 2019 MVP 2021 Report Share Posted March 21, 2019 45 minutes ago, Vprakatoor said: so i wont know if it solved The suggestion wasn't to solve your problem - it was to help isolate the location of the problem. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Ausman Posted March 21, 2019 MVP 2021 Report Share Posted March 21, 2019 In addition to what Flex has said, have you monitored things online when the issue is happening? To ensure that the raw reading is changing, rather than something in your program doing this. cheers, Aus Quote Link to comment Share on other sites More sharing options...
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