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Question Why do the WinPLC's RUN/POWER LEDs blink?
Answer The WinPLC uses the indcators to display an error has occured.
  • RUN LED off - No project running
  • RUN LED on - project running
  • POWER LED flashing - used with "Identify CE Station"
  • RUN LED blinking - unable to run project


Sometimes there may be exceptional problems that the WinPLC can't recover from. The WinPLC tries to trap these errors and give some indication of the error by flashing a pattern on the LEDs. The POWER LED constantly goes through a sequence where it blinks a number of times and then stays off for a while. The number of times it blinks between the pauses indicates the type of error it encountered:
  • 1 blink - runtime thread stopped running
  • 2 blinks - cpu exception in the runtime thread
  • 3 blinks - winsock server on WinPLC stopped running
  • 4 blinks - cpu exception in winsock thread
  • 5 blinks - cpu exception in serial comm thread
  • 6 blinks - cpu exception in background thread
  • 7 blinks - not used (indicates power-fail exception)
  • 8 blinks - unknown error

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This item was last updated on 09-22-2009
Document ID: 1046

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