Functional Description - Parker AC30E Produkthandbuch

D-142
Parameter Reference
Parameter Name No.
Pwrl Decel Rate 1649
Rate in Hz/s ( electrical frequency/ second) at which the speed septoint is ramped to Zero
If this value is set too low, then the deceleration will may be not enough high for having regenerative condition to maintain the dc link.
Pwrl Time Limit 1650
Maximum allowed time in second of the Power Loss Ride Through sequence
If this value is reached, the the drive will trip on POWER LOSS STOP.
Pwrl Active 1651
This diagnostic is TRUE while the Power Loss Ride Through is active

Functional Description

When Pwrl Enable is set to TRUE, the block controls the behaviour of the drive during a power outage.
This is achieved by ramping the speed setpoint to zero( Pwrl Decel Rate ).
The dc link fall detection is triggered by Pwrl Trip Threshold. Pwrl Control Band determines the band of dc link ( between by Pwrl Trip
Threshold and Pwrl trip Threshold + Pwrl Control Band ) while the speed septoint is ramped down to zero using Pwrl Decel Rate to try
recovering the kinetic energy.
If during the outage the supply returns, the speed is automatically ramped back ( Pwrl Accel Rate ) to the speed setpoint.
The condition to validate the supply returns is met if the dc link is kept higher than ( Pwrl trip Threshold + Pwrl Control Band ) for more than
500ms. During this time, the speed setpoint is hold.
Pwrl Time Limit determines the maximum time of the Power Loss Ride Through sequence. If this time is exceeded, the drive will trip on POWER
LOSS STOP.
During the Power Loss Ride Through sequence, Pwrl Active becomes TRUE.
When Pwrl Enable is set to FALSE, the drive will trip on UNDERVOLTS if the main supply is removed.
This feature is run at a rate of 1 milli-second.
Path
Parameters::Motor Control::Power Loss
Ride Thru
Parameters::Motor Control::Power Loss
Ride Thru
Parameters::Motor Control::Power Loss
Ride Thru
Default Range
100 1 to 500
30.000 0.000 to 300.000
Units Writable
STOPPED
Hz/s
s STOPPED
NEVER
AC30 series Variable Speed Drive