Table Of Contents

Overcurrent Diagnostics (Digital)

Version:
    Last Modified: May 15, 2018

    You can enable overcurrent diagnostics for:

    • Digital outputs in any configuration
    • Digital inputs configured with test pulses

    When the current on the configured channel exceeds module specifications, the module will respond based on how you configured the overcurrent fault. The pull-down menu in the overcurrent recovery column of the Faults table allows you to choose from three different responses for an overcurrent fault.

    • Failsafe—The module goes into Fail-safe Mode.
    • Auto recover—The channel de-energizes and the User Program returns a fault on DOn.OvercurrentFault or DIn.OvercurrentFault. You can use the fault as a transition condition on the state machine diagram. If an overcurrent fault occurs, the User Program will transition to a user-configured state. After the Recovery time elapses, the fault will clear, allowing the user to energize the output again. If the current remains in an overcurrent state, the channel will de-energize again. The de-energize and auto recover cycle will continue until the module no longer reads an overcurrent condition.
    • No recover—The channel de-energizes and the User Program returns a fault on DOn.OvercurrentFault or DIn.OvercurrentFault. You can use the fault as a transition condition on the state machine diagram. If an overcurrent fault occurs, the User Program will transition to a user-configured state. The digital output channel on which the fault occurred will de-energize. You must cycle Vsup power to the module to re-energize the channel.

    Recently Viewed Topics