ABB ACS880 - Page 272

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
20.000 s / real32Defines deceleration time 1 as the time required for the
speed to change from the speed defined by parameter
46.1 Speed scaling (not from parameter 30.12 Maximum
speed) to zero.
If the speed reference decreases slower than the set
deceleration rate, the motor speed will follow the reference.
If the reference changes faster than the set deceleration
rate, the motor speed will follow the deceleration rate.
If the deceleration rate is set too short, the drive will
automatically prolong the deceleration in order not to
exceed drive torque limits (or not to exceed a safe DC link
voltage). If there is any doubt about the deceleration time
being too short, ensure that DC overvoltage control is on
(parameter 30.30 Overvoltage control).
Note: If a short deceleration time is needed for a high
inertia application, the drive should be equipped with
braking equipment such as a brake chopper and brake
resistor.
Deceleration time 123.13
10 = 1 s / 1000 = 1 sDeceleration time 1.0.000 ... 1800.000 s
60.000 s / real32
Defines acceleration time 2. See parameter 23.12
Acceleration time 1.
Acceleration time 223.14
10 = 1 s / 1000 = 1 sAcceleration time 2.0.000 ... 1800.000 s
60.000 s / real32
Defines deceleration time 2. See parameter 23.13
Deceleration time 1.
Deceleration time 223.15
10 = 1 s / 1000 = 1 sDeceleration time 2.0.000 ... 1800.000 s
272 Parameters