Parker AC30 Série Mode D'emploi page 461

Slew Rate
Parameters::Motor Control::Slew Rate
Designed for VOLTS/Hz motor Control Mode.
This function prevents over-current and over-voltage faults occurring due to a rapidly changing setpoint.
Parameter Name No.
Slew Rate Enable 0360
Enable/Disable slew rate limit
Slew Rate Accel Limit 0361
Maximum rate at which the setpoint can be changed away from zero
Slew Rate Decel Limit 0362
Maximum rate at which the setpoint can be changed towards zero
Functional Description
The Slew Rate limit obtains the setpoint from the output of the application, correctly scaled by the Reference feature and already processed by the
Power Loss Ride Thru and the DC Link Volts Limit features ( if enabled ). The rate of change limits are applied and the setpoint is then passed on
for further processing.
When the braking feature determines that the internal dc link voltage is too high it issues a Hold signal. This causes the Slew Rate limit function to
hold the setpoint at its current value. This typically lasts for only 1ms, time for the excess energy to be dumped into the dynamic braking resistor.
User
Ramp
AC30 series Variable Speed Drive
Path
Parameters::Motor Control::Slew Rate
Parameters::Motor Control::Slew Rate
Parameters::Motor Control::Slew Rate
Speed Setpoint path
Power Loss
Ride Thru
Parameter Reference
Default Range
TRUE
500 1 to 1200
500 1 to 1200
DC Link Slew Rate
Volts Limit (V/Hz only)
D-175
Units Writable
ALWAYS
ALWAYS
Hz/s
ALWAYS
Hz/s
Speed control loop