GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions
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Main Contactor Configuration

The sequencer normall y controls the operation of the main (MA) contactor. The

contactor is picked up when the drive is powered up and only drops out when a Trip

fault exists in th e drive. The contactor may also be independently controlled fr om an

external input.

Function input

Parameter Description
MA close req sel Selects the Bool ean variable th at drives MA cont enable
req to independently control the contactor. Note: If this
input is used, the contactor MUST be picked before a run
request is sent to the drive, otherwise a trip fault, Run
before MA closed, will be issued.
If MA close req sel is set to Unused, the contactor will be
automatically driven by the sequencer.

Function output

Variable Description
MA cont enable req Request from sequencer to pick-up or drop out the main
contactor.
MA cont enable stat Status to indicate to the sequencer that the main contactor
has been picked-up (dropped-out).
MA close comm and Internal command to the contactor hardware to pick-up or
drop out the contactor.
MA contact or closed Actual f eedback from t he contactor indicating that the
contactor has been picked-up or dropped out. If
connected, then MA contactor fbk must be set to True. If
the feedback is not connected , then the contac tor
sequencing uses MA pickup time to indicate the contactor
status (MA cont enable stat).
Function configuration
Parameter Description
MA contactor absent Speci fies whether a contactor is abs ent. If this param eter
is not set correctly, the contactor sequencin g will not work
properly.
MA contactor fbk Enables the sequencing logic to look at contactor feedback
to determi ne if the contactor status meets the r equest.
(See MA pickup time below.)
MA pickup time If MA contactor fbk is enabled, then this acts as a time-out
delay. If the contactor feedback hasn’t met the command
within the specified time, the drive will generate a Cont
failed to close trip fault.
If MA contactor fbk is disabled, then this acts as the
contactor simulated feedback delay, and will update the
status to match the request after the specified delay. The
maximum delay time is 2 seconds. In simulator mode, the
sequencer i gnores the conta ctor feedback ev en if MA
contactor fbk is enabled.