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Overcurrent Recovery (Digital Configurations)

    Last Modified: May 15, 2018

    When an overcurrent condition occurs on a digital channel, the channel de-energizes and the User Program returns an overcurrent fault. Configuring a digital input with test pulses or output populates the Faults table with an overcurrent fault for that channel.

    Figure 1. Overcurrent Faults in the Faults Table

    Overcurrent faults include an Overcurrent recovery pull-down menu that allows you to configure how the module responds when that channel reads an overcurrent condition.

    • Failsafe—The module goes into Fail-safe Mode until you cycle external Vsup power to the module. This selection functions in the same way as checking the module failsafe box for other fault signals.
      Figure 2. Overcurrent Fault Set to Failsafe
    • Auto recover—The channel de-energizes. After the Recovery time elapses, the fault will clear, allowing the user program 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.
      Figure 3. Overcurrent Fault Set to Autorecover
    • No recover—The channel de-energizes and remains de-energized until you cycle external Vsup power to the module. You can use the fault as a transition condition in the state machine diagram.
      Figure 4. Overcurrent Fault Set to No Recover

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