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Transistor

GX Works3: Ladder monitoring not working but watch window is ...

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I'm doing some remote support on an FX5U with GX Works3 on the remote desktop. I've been doing this for a couple of weeks without difficulty.

  • Yesterday the ladder monitoring stopped working. There is no ladder contact monitoring showing and D registers and timer values are blank.
  • The Watch windows are working correctly.
  • Online Write Monitor is selected in each case.
  • All Tools | Options seem correct and match my local copy of GX Works3 that I used on site.

Any ideas?

 

Edited by Transistor
Clarification on what is and isn't working.

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Are the D registers etc. displaying "0" or is not in monitor mode at all? If it's the former, it's possible that the data is not in the plc, not being scanned or does not match with your copy in the tool. For the latter there should be a communication error when you press F3.

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Quote

Are the D registers etc. displaying "0" or is not in monitor mode at all?

Thanks, Luke. There are no values in the ladder display. All is fine in the watch window. The ladder doesn't seem to be in monitor mode at all.

Quote

If it's the former, it's possible that the data is not in the plc, not being scanned or does not match with your copy in the tool.

Data is in the PLC and it's being scanned by the watch window.

 

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