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tomhw
@tomhw
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Joined: Mar 3, 2025
Last seen: Sep 19, 2026
Topics: 7 / Replies: 37
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RE: S7-1200 ERROR LED flashing after replacing an SM 1223, hardware mismatch slot 2

There's your mismatch. 1BL32 is 24VDC transistor outputs, 1PL32 is relay outputs. Same face, same channel count, different module as far as the CPU is...

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

In STOP the outputs go to their substitute values, and for a PROFINET IO device the output data gets marked invalid. Green LEDs, no valid setpoint. I'...

3 weeks ago
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RE: Modbus TCP over LTE, half of twelve wellpad RTUs time out every poll cycle

About 60 registers per site, in three blocks because the maps aren't contiguous. One after the other, the driver just works through them as a list. So...

3 weeks ago
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RE: S7-1200 ET 200SP "Not reachable" after renaming the device in TIA V17

V17 here too and I've had exactly this after a rename. Post the top entry of the CPU diagnostics buffer. Mine read "IO device failure, cell2-io, Not r...

3 weeks ago
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RE: TIA V17 adding a static to an FB reset every recipe value in the instance DB

Re-entered the values from the customer's recipe sheet, took the operator an hour and I owe him a coffee for it. Then enabled Download without reiniti...

3 weeks ago
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RE: TIA V17 refuses to open the OEM project, "created with a newer version", OEM says V17

It does. TIA opens projects from its own version and update level or lower, never higher. A project saved on V17 Update 6 won't open on V17 Update 2, ...

3 weeks ago
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RE: Two RSLogix 5000 ACD files after a contractor visit, need to see what changed rung by rung

V17 here, but it's the same job on either side. Two ways. Logix ships a compare tool with RSLogix 5000, in the Rockwell Software folder, RSLogix 5000...

3 weeks ago
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RE: New ET 200SP station, IM 155-6 red ERROR, every module shows missing

There's your problem. An ET 200SP needs the server module on the end, the small grey thing that comes in the box with the IM, it closes the backplane ...

3 weeks ago
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RE: PID_Compact stays Inactive on an S7-1200, State 0, Output never moves

Every PID_Compact I ship has RunModeByStartup left at default. Noted.

3 weeks ago
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RE: KTP700 Basic, TIA V16 transfer fails with no connection to device, panel answers ping

StopRuntime system function on a button. Hide it behind a login.

3 weeks ago
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