ABB ACQ810, Firmware Manual

Page: 141 / 376

Parameters 141
11.03 Stop mode Selects the motor stop function.
Coast Stop by cutting of the motor power supply. The motor coasts
to a stop.
WARNING! If the mechanical brake is used, ensure it
is safe to stop the drive by coasting.
1
Ramp Stop along ramp. See parameter group 22 Speed ref ramp
on page 173 .
2
11.04 Dc hold speed Defines the DC hold speed. See parameter 11.06 Dc hold .
0.0 … 1000.0 rpm DC hold speed. 10 = 1 rpm
11.05 Dc hold curr ref Defines the DC hold current in percent of the motor nominal
current. See parameter
11.06 Dc hold .
0 … 100% DC hold current. 1 = 1%
11.06 Dc hold Enables the DC hold function. The function makes it possible
to lock the rotor at zero speed.
When both the reference and the speed drop below the
value of parameter
11.04 Dc hold speed , the drive will stop
generating sinusoidal current and start to inject DC into the
motor. The current is set by parameter
11.05 Dc hold curr
ref . When the reference speed exceeds parameter 11.04 Dc
hold speed , normal drive operation continues.
Notes:
• The DC hold function has no effect if the start signal is
switched off.
• The DC hold function can only be activated in speed
control mode.
• The DC hold function cannot be activated if parameter
99.05 Motor ctrl mode is set to Scalar .
• 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.
Disabled The DC hold function is disabled. 0
Enabled The DC hold function is enabled. 1
12
12 Operating mode Selection of external control location and EXT2 operating
mode.
12.01 Ext1/Ext2 sel Selects the external control location (EXT1 or EXT2), or the
source of a selection signal (0 = EXT1; 1 = EXT2).
Ext1 EXT1 is active. 0
No. Name/Value Description FbEq
Reference
Motor speed
DC hold
11.04 Dc hold
speed
t
t