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GRD PWR Light Problem

Hi Steve,

Sorry to bother you again. I'm trying to program a two-way T8 switch to operate GRD PWR which has a three-way operation.

Using MOUSELEFT_WITH_OFF it correctly operates the switch but the LED remains on when GRD PWR is off and I've tried pretty much all combinations of LIGHT ACTION without success. Can you help please? I can't find suitable example for this.
Cheers,
Ray (Cheshire, England)

Comments

  • Thinking about this away from the PC I’m guessing 0 is Off but not sure if 1 is On and 2 is the middle position.

    Or perhaps 2 is On and 1 is the middle position.

    The light does extinguish briefly when I choose Off for the Light with a value of 0. But it then returns to the middle position and then comes back on again.

    Because it returns to the middle position after being turned both on and off I cannot fathom how to program the light.
    Cheers,
    Ray (Cheshire, England)
  • Hi Ray,

    If you are using this DATA_FWDOH_ELEC_SWITCH_GRD_POWER it is a Boolean and can only be 0 or 1. You could double check by assigning it to a GF46 display or GF166 display.

    Best wishes
    Steve
  • Hi Steve,

    That is the command I'm using. Given it's a boolean my options appear limited. LED Always On or Always Off.

    I don't have a GF46 unit and although I have a GF166 I don't follow your reasoning that it can be used to check its status. That would be a temporary assignment I guess but I don't know how to set things up to check.
    Cheers,
    Ray (Cheshire, England)
  • If your LIGHT ACTION is set to ON and value 1 then when it becomes 0 it will go off. Remember that the lights only change when the data changes so during config it can appear not to be working but if you flick the switch in the VC a few times it should sync with GIT.

    Best wishes
    Steve
  • Steve, I'll check this tomorrow but could you just confirm the values of the three-way switch. Bear in mind it always returns to a central position.

    So is that a value of 3 with on being 1 and off being 0? If so then it's always at 3 with 0 and 1 being transitory.
    Cheers,
    Ray (Cheshire, England)
  • Hi Steve,

    I've tried what you suggest but the light only goes off briefly when the switch moves to the OFF position. As you know it then move to a middle position and at that point the light comes back on.

    As well as trying Light Action of ON I have also tried OFF_LESS_THAN, OFF_GREATER_THAN, ON_LESS_THAN and ON_GREATER_THAN and trying various numeric values in the Light Value field but none will extinguish the LED when GRD PWR is turned OFF.

    Do you have a T8 unit so you can replicate this issue?
    Cheers,
    Ray (Cheshire, England)
  • Hi Ray,

    I have just tested it and you correct, it is not working correctly. Having checked the code and confirmed it is correct for this variable, it looks like a bug in the PMDG SDK which I will pass to PMDG to resolve.

    Best wishes
    Steve
  • Thanks Steve. Given its age do you think they will issue a fix? In the meantime I'll workaround the problem.
    Cheers,
    Ray (Cheshire, England)
  • Don't know, but I have just put a ticket in to PMDG.
  • Hi Steve,

    I've managed to get the overhead GRD PWR light to correspond with the LED on my T8 unit. Thinking about it the light shows when GRD PWR is running and off when it isn't. Looking through the available actions for the Light Data for the T8 I selected DATA_FWDOH_ELEC_LIGHT_GROUND_POWER and with a Light Action of ON and Light Value of 1 the T8 LED now corresponds to the overhead switch.

    I have programmed a series of CDU selections into that switch and it all works fine except it needs a double switch action to turn on GRD PWR as the status of the Wheel Chocks can't be determined beforehand. A small price to pay for having a correctly functioning status light.
    Cheers,
    Ray (Cheshire, England)
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