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annaz
@annaz
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Joined: Jan 12, 2026
Last seen: Sep 22, 2026
Topics: 8 / Replies: 32
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RE: S7-1200 bit set at the end of OB1 is seen one cycle late at the top, trace shows the lag

Swapped the two calls over. Trace shows the output in the same cycle as the input now, screenshot attached. It was the call order all along. The bit ...

3 weeks ago
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RE: SM 1231 current input reads 0 with a 2-wire 4-20mA level transmitter

Transmitter plus to 0+, transmitter minus to 0-, nothing else connected to it. Meter in series reads 0.0 mA. The old transmitter had four wires, two w...

3 weeks ago
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RE: SINAMICS G120 F01910 fieldbus setpoint timeout when the PLC goes to STOP

So the drive is right and I'm the problem. I was stuck on the cable for two days. Why does the CPU stop sending, though? It's still powered and the PR...

3 weeks ago
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RE: S7-1500 time-of-day one hour off after DST, RD_SYS_T and the Comfort panel disagree

Swapping the instruction on my rig tonight, mine reads UTC too then.

3 weeks ago
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Replies: 8
Views: 23
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RE: TIA V16 PLCSIM load fails, "simulation is not supported" for a block

Both V16, Update 6 I think, whatever the lab image has. FB_Conveyor is from the course, we wrote it in class, no library.

3 weeks ago
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RE: S7-1200 bit set at the end of OB1 is seen one cycle late at the top, trace shows the lag

Network 1: CALL FC_Sequence. Network 2: CALL FC_Sensors. Sensors last, because I wrote it last. Screenshot of OB1 attached.

3 weeks ago
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RE: SINAMICS G120 F01910 fieldbus setpoint timeout when the PLC goes to STOP

Only on STOP. In RUN it ran an hour with nothing, so I think it's tied to the STOP. The CPU buffer at that time just says "CPU changes from RUN to STO...

3 weeks ago
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RE: TIA V17 second valve FB call opens valve 1 as well, copied the call for valve 2

New instance DB_Valve2 on the second call. Valve 2 opens on Q0.1 only, valve 1 stays where it was, both timeouts run separately. Screenshot attached. ...

3 weeks ago
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