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