When a trip occurs, the Drive's power stage is immediately disabled causing the motor and load to coast to a stop. The trip is latched until action is

taken to reset it. This ensures that trips due to transient conditions are captured and the Drive is disabled, even when the original cause of the trip is no

longer present.

Drive Indications

If a trip condition is detected the unit displays and performs the following actions.

1. The HEALTH LED goes out indicating a Trip condition has occurred. (Investigate, find and remove the cause of the trip).

2. Terminal B6 (Healthy) goes low (0V).

Keypad Indications

If a trip condition is detected the MMI displays and performs the following actions.

1. The HEALTH LED goes out indicating a Trip condition has occurred. The MMI displays the activated alarm. (Investigate, find and remove the

cause of the trip.)

2. The alarm message(s) can be acknowledged by pressing the E key, however, the unit will not restart at this point.

3. If using Serial Comms, xxx PARM >0000.

Resetting a Trip Condition

All trips must be reset before the Drive can be re-enabled. A trip can only be reset once the trip condition is no longer active, i.e. a trip due to a

heatsink over-temperature will not reset until the temperature is below the trip level.

NOTE

More than one trip can be active at any time. For example, it is possible for both the HEATSINK TRIP and the OVERVOLTS (VA) trips to

be active. Alternatively it is possible for the Drive to trip due to a FIELD OVER I error and then for the HEATSINK TRIP trip to become

active after the Drive has stopped (this may occur due to the thermal time constant of the heatsink).

You can reset the trip(s) in one of two ways:

1. Power-up, or remove and re-apply the auxiliary power supply.

2. Stop and start the drive, i.e. remove and re-apply the Start/Run signal (terminal C3 or C4, or the STOP and RUN keys on the MMI).

Success is indicated by the HEALTH LED (on the unit or MMI) illuminating. The MMI will return to its original display.

DC590+ DRV Series DC Digital Drive

7-1

Trips and Fault Finding