ABB ACS880 - Page 312

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
10 = 1 s / 1000 = 1 sAcceleration time 1.0.000 ... 1800.000 s
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 / real32Defines 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 / real32Defines 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
312 Parameters