Our housing count goes up when the monitor comes back

NoahChen1151 · 14 Aug 2025, 15:02 UTC

Closed
NO
NoahChen1151
I unplugged the monitoring laptop from our UR5e inspection network during a completed job and reconnecting added another accepted housing. Nothing moved in the cell. The ordinary completion signal was still high. I was going to ignore the first reading after connection. Thinking about it, that could hide a real result too. What should the app compare before deciding that reading represents another housing?

10 replies

TO
TobyAllen0318
Replying to NoahChen1151

Did the PLC retain a job reference beside that high signal, and did your laptop read it?

24 points
NO
NoahChen1151
Replying to TobyAllen0318

The PLC has a job number. Our app reads only the completion bit at present. Bit embarrassing, since the number is on the interface sheet

5 points
AL
AlexBennett0733
Replying to NoahChen1151

Was the first count saved before you disconnected? I ask because remembering the last displayed number and remembering which job was counted are different things in our little tracker.

17 points
NO
NoahChen1151
Replying to AlexBennett0733

The total was saved. There isn't a list of counted jobs, just a running total in the local file.

7 points
TO
TobyAllen0318
Replying to NoahChen1151

Then give the maintainer that exact replay case: saved total, already-counted job still high, new app connection.

24 points
MA
MayaBarnes0562
Replying to NoahChen1151

Does the job number start again after a PLC restart?

6 points
NO
NoahChen1151
Replying to MayaBarnes0562

Yes. Controls confirmed it resets. We need a run identity with it, not just the bare job number. They're reviewing what the PLC can retain and report reliably.

18 points
AL
AlexBennett0733
Replying to NoahChen1151

That caught ours in testing. We added a list of jobs and were delighted until a new run reused the numbers. It is worth testing a completed job that the app never saw, too; otherwise the duplicate fix can quietly throw away missing results.

22 points
NO
NoahChen1151
Replying to AlexBennett0733

Maintainer has both cases now, Alex. We removed my ignore-first-reading idea from the change request. Revised interface is still being worked out, so I haven't got a fixed count to report.

12 points
TO
TobyAllen0318
Replying to NoahChen1151

Thanks for checking the reset, Noah; that belongs in our teaching example as well.

20 points

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