Download GE General Electric Computer Accessories Medium Voltage GP Type G Drives User's Manual

Drive Commissioning: X-Stop Configuration
The Run req & xstop open trip fault occurs when the X stop circuit is open, the drive
is stopped, and one of the following requests is issued: Run request, Jog request, or
Full flux request.
The state of the X stop circuit is determined by the value of the variable to which
parameter X stop request sel points. The trip fault can be disabled, along with all
other X stop behavior, by setting parameter X stop request sel equal to Unused.
An X-stop can have 1 of 5 stopping behaviors as configured by the parameter X stop
mode.
Value of X stop mode
Behavior
Nrml (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 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 restarted until Speed reg fbk has reached the Zero speed
level, unless Flying restart is enabled.
Trip flt stop
Behavior is similar to that of a Coast stop, except that a
Trip fault, X stop, is also generated.
Emerg ramp stop
The drive follows a linear speed deceleration ramp
down to zero as configured by the parameter Emerg
ramp rate. (See also the Speed Reference Ramp.)
Once the drive detects that Speed reg fbk has reached
the Zero speed level, the sequencer disables the
regulators and stops the drive.
Once the drive is stopped, X stop active must be set False before the drive is restarted. Otherwise, if any type of run is requested, the sequencer will generate an Run
req & xstop open Trip fault.
Drive Commissioning: X-Stop Ramp Time
X stop request sel points to the variable whose transition to False causes the drive to
stop in X-stop mode. Emerg ramp rate is used as the Ramp deceleration rate when
X-stop is active.
4-18 • Chapter 4 Wizards
Innovation Series Medium Voltage GP Type - G Drives GEH-6385