Actual signals and parameters 221
DC HOLD DC hold function active. DC hold is not possible if parameter
9904 MOTOR CTRL MODE setting is SCALAR: FREQ.
When both the reference and the motor speed drop below
the value of parameter 2105 DC HOLD SPEED, the drive
will stop generating sinusoidal current and start to inject DC
into the motor. The current is set by parameter 2106 DC
CURR REF. When the reference speed exceeds parameter
2105 value, normal drive operation continues.
Note: DC hold has no effect if the start signal is switched
off.
Note: Injecting DC current into the motor causes the motor
to heat up. In applications where long DC hold times are
required, externally ventilated motors should be used. If the
DC hold period is long, the DC hold cannot prevent the
motor shaft from rotating if a constant load is applied to the
motor.
1
DC BRAKING DC current braking function active.
If parameter 2102 STOP FUNCTION is set to COAST, DC
braking is applied after the start command is removed.
If parameter 2102 STOP FUNCTION is set to RAMP, DC
braking is applied after the ramp.
2
2105 DC HOLD
SPEED
Defines the DC hold speed. See parameter 2104 DC HOLD
CTL.
5rpm
0…360 rpm Speed 1 = 1 rpm
2106 DC CURR REF Defines the DC hold current. See parameter 2104 DC
HOLD CTL.
30%
0…100% Value in percent of the motor nominal current (parameter
9906 MOTOR NOM CURR)
1 = 1%
2107 DC BRAKE
TIME
Defines the DC brake time. 0.0 s
0.0…250.0 s Time 1 = 0.1 s
All parameters
No. Name/Value Description Def/FbEq
t
t
Motor speed
DC hold speed
Ref
DC hold
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