- General Electric Computer Accessories User Manual

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• Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Function configuration
Parameter Description
Normal stop mode Selects the behavior of a normal stop. Possible
choices are:
Ramp stop
Quick stop
Coast stop
(See below.)
Flux off delay time Sets a time delay for which the drive remains fluxed
after it has stopped. Allows the drive to be quickly re-
started after it has stopped, without the delay of pre-
fluxing the drive.
Function description
A normal stop can be generated from one of several different inputs, but has 1 of 3
stopping behaviors as configured by the parameter Normal stop mode.
Ramp stop
The drive follows a linear speed deceleration ramp
down to zero speed as configured by the Speed
Reference Ramp function. Once the drive detects that
Speed reg fbk has reached the Zero speed level, the
sequencer disables the regulators and stops the drive.
Quick stop
The speed reference is stepped to zero so that the
speed is brought to zero as quickly as possible (the
drive is in current limit). Once the drive detects that
Speed reg fbk has reached the Zero speed level, the
sequencer disables the regulators and stops the drive.
Coast stop The regulators are immediately disabled and power is
removed from the motor so that it will coast to a stop.
The sequencer will prevent the drive from being re-
started until Speed reg fbk has reached the Zero speed
level, unless Flying restart is enabled.
Note If Normal stop mode is set to Quick stop or to Coast stop, it is recommended
that the parameter Bypass Q/C stop be set to Yes.
Otherwise, if the application uses Full flux request or has set the Flux off delay time,
the sequencer will not properly maintain flux on the drive.
Related diagrams
• General Sequencing #2 (GenSeq_2)
X-Stop
The X-stop is an alternate way to stop the drive in a controlled manner. An X-stop
can be configured as Ramp stop, Coast stop, Quick stop, Trip fault stop, or
Emergency Ramp stop.