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finn21
@finn21
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Joined: Oct 6, 2025
Last seen: Sep 19, 2026
Topics: 5 / Replies: 30
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RE: 1756-L73 major fault T06:C01 task watchdog expired after adding a routine

Is the watchdog basically a timer for how long one pass of the task is allowed to take?

3 weeks ago
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RE: PLCSIM Advanced instance running, TIA Go online shows no accessible devices

Three entries: "Intel(R) Ethernet Connection I219-LM", "Siemens PLCSIM Virtual Ethernet Adapter", and "PLCSIM". I've only ever picked the first one.

3 weeks ago
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RE: PIDE output stuck at 100 percent for minutes after steam came back

Why would the loop hold at 100 after the temperature is already past setpoint? Isn't the error negative then?

3 weeks ago
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RE: 1769-L33ER watchdog fault, type 6 code 1, after adding an ST WHILE loop

Continuous. The IF is there because the first download gave me a type 4 code 20 array fault when i got to 50, so I put i back to 0 and that fault went...

3 weeks ago
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RE: 1734-IB8S door switch input short to test output every time the door closes

Meter across the two panel wires with the switch disconnected reads 0.3 ohms so they are connected somewhere, but the old switch worked for years on t...

3 weeks ago
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RE: TIA V17 can't find the S7-1500, device not accessible, but ping works

Cable's in the USB dongle, it shows up as "ASIX AX88179 USB 3.0 to Gigabit Ethernet". Direct to the CPU, no switch. Route print says 192.168.10.0 goes...

3 weeks ago
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RE: MSG read works for one tag and errors for another on the same target controller

What's the External Access column for? I've never touched it. Not sure I get it.

3 weeks ago
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RE: RSLinx shows red X on 1756-EN2T in RSWho, ping works from the same laptop

so it's like the laptop shouting in one room and the PLC being in the next room with the door shut? Ok.

3 weeks ago
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RE: S7-1500 OPC UA server connects, UaExpert shows no DB variables

Is that the "Accessible from HMI" tick box thing? So if I've understood it, the DB has to be marked accessible, not just exist in the project?

3 weeks ago
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RE: PowerFlex 525 16#0116 electronic keying mismatch after drive swap

So if I'm reading this right, the PLC expects the exact drive it was set up with and the new one's a different version, so it says no. Is that it?

3 weeks ago
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RE: GuardLogix DCS discrepancy fault on one E-stop about once a week, button tests fine

Sorry, so the discrepancy time is how long the two contacts are allowed to disagree before it faults? So one contact is opening and the other is not, ...

3 weeks ago
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RE: MicroLogix 1400 CTU counts two or three per bag from a photoeye, count 15 percent high

Could the scan be too fast and the PLC counting the same bag on two scans? We had something like that on a line at college, or I think we did.

3 weeks ago
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