- General Electric Computer Accessories User Manual

GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions •
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• 3-75
Function outputs
Variable Description
Trip fault active Indicates when a Trip fault is present. Trip fault active is True
when a Trip fault exists. It is a NC contact in the Ready to run
permissive string. Refer to Sequencer Permissives.
No trip fault
Indicates when a Trip fault is NOT present. Is True when there is
no Trip fault. (Alarm may exist).
No faults active
Indicates when no Trip faults or Alarms are present. Is True when
no faults or alarms exist in the drive.
Function description
When the drive is running and a Trip fault is generated, the sequencer will perform
the following actions in order:
• Disables the drive flux, Flux enable status and the bridge power enable, Bridge
is on.
• Disables the drive torque, Torque reg enabled.
• Opens the contactor, if present. The contactor will remain open as long as a
Trip fault exists. See Main Contactor Configuration.
• Disables the speed regulator, Sreg enable status.
• Disables the speed reference, Speed ref enabled.
The sequencer also removes any type of run request to the drive because the Ready
to run permissive string drops out due to the Trip fault. This will also keep the drive
from trying to run while a Trip fault is present.
Because the bridge is turned off during a Trip fault, the sequencer essentially
performs a coast stop. A coast stop occurs when the power to the motor is removed
and the motor coasts to a stop.
To reset a Trip fault or Alarm, request a Fault reset using one of the Function inputs
described above.
Note Performing a Fault reset may not clear the fault if the fault condition still
exists, or if the fault is Locked.
Related diagrams
• General Sequencing #1 (GenSeq_1)