PLD STATUS ERROR?

My trusty Megger LCB2000/2, having been resurrected once before, has begun to chuck out a Error 33 which when looked up in the manual, says 'PLD Status Error'. It happens on no-trip loop setting.

Can anyone shed some light upon what PLD status error actually means? A quick scooby around the web yields nothing but there is a hint about something to do with the display?

An overnight Off period and next-day set of new batteries being fitted haven't made the problem go away.

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  • programmable logic device - but the real question is why, and ar that point you need the internal circuits and much other info.

    How different is it inside to the LCB2500 ?

    If the PLD is similar, then apart from checking the 5V rail really is there is not a lot to go wrong. I'd be looking at the inputs  the PLD for a lock up condition,

    M.

  • Thanks Mike,

    RE: Differences between the 2000/2 & 2500/2. The real difference is that the 2500 has more features which are principally related to the storage/retrieval of test results.

    To quote directly from the manual -

    The LCB2500 includes results storage and serial (RS232) communication with a printer or PC. The
    LCB2000 has the following differences:
    No RCL switch position
    No small RS232 board, and no 9 way ‘D’ connector
    No serial communications circuits on the main board.
    Different label and key switches
    The only other difference in operation is that it is not possible to store results on the LCB2000. As in the test of the LCB2500 the instrument serial number is stored, if this is blank it is assumed that the instrument is an LCB2000 and result storage is disabled

    The manual also says this about Error 33 -

    PLD not producing correct 'status' signal.
    During a measurement the status signal is monitored. If it does not
    finish quickly enough, this error is raised. Could be PLD or signals
    driving PLD.

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  • Thanks Mike,

    RE: Differences between the 2000/2 & 2500/2. The real difference is that the 2500 has more features which are principally related to the storage/retrieval of test results.

    To quote directly from the manual -

    The LCB2500 includes results storage and serial (RS232) communication with a printer or PC. The
    LCB2000 has the following differences:
    No RCL switch position
    No small RS232 board, and no 9 way ‘D’ connector
    No serial communications circuits on the main board.
    Different label and key switches
    The only other difference in operation is that it is not possible to store results on the LCB2000. As in the test of the LCB2500 the instrument serial number is stored, if this is blank it is assumed that the instrument is an LCB2000 and result storage is disabled

    The manual also says this about Error 33 -

    PLD not producing correct 'status' signal.
    During a measurement the status signal is monitored. If it does not
    finish quickly enough, this error is raised. Could be PLD or signals
    driving PLD.

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