Table Of Contents

Known Issues for Firmware Versions

Version:
    Last Modified: March 29, 2018

    Open Circuit Faults on Digital Outputs

    An open circuit fault will persist for the duration of the fault latch time when the User Program restarts as a result of changing operation modes.

    Passthrough Value Behavior

    A channel driven true by passthrough from the monitoring VI in LabVIEW remains high after the module has been removed from the CompactRIO controller or if communication to the controller is lost.

    Overcurrent on Dual Digital Inputs with Test Pulses

    In a dual input with test pulse configuration, an overcurrent condition on the odd-numbered channel causes both channels to de-energize. An overcurrent condition on an even-numbered channel only causes the even-numbered channel to de-energize.

    Undetected Faults When Driving Heavy Loads

    In the following digital output configurations, the module will not generate test pulses, detect shorts to Vsup, or detect stuck high conditions.

    • Single output with heavy output loading when the corresponding DI channel is unused or the corresponding DI channel is used and has a debounce filter of 0 μs to 16,383 μs or 2,125 ms to 5 s.
    • Dual output with heavy output loading when the corresponding DI channel is unused or the corresponding DI channel is used and has a debounce filter of 0 μs to 16,383 μs or 2,125 ms to 5 s.
    • Single output with external readback with heavy output loading and a debounce filter of 85 μs to 16,383 μs or 2,125 ms to 5 s.
    • Single output with internal test pulse with heavy output loading when the corresponding DI channel is unused or the corresponding DI channel is used and has a debounce filter of 0 μs to 16,383 μs.
    • Dual output with internal test pulse with heavy output loading when the corresponding DI channel is unused or the corresponding DI channel is used and has a debounce filter of 0 μs to 16,383 μs.

    To avoid this condition, use one of the following methods:

    • Use a debounce time between 16.5 ms and 2.047s.
    • Verify that your application requires heavy output line loading. Refer to the Output Line Load section.
      • If your application does not require heavy output line loading, use a maximum of medium output line loading.
      • If your application requires heavy output line loading, add a pulldown resistor to the output channel to reduce the output line load.

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