Delta VFD4A8MS21ANSAA User Manual

Chapter 12 Descriptions of Parameter SettingsMS300
394

07-29
Slip Deviation Level
Default: 0
Settings
0.0–100.0%
0: No detection

07-30
Over-slip Deviation Detection Time
Default: 1.0
Settings
0.0–10.0 sec.

07-31
Over-slip Deviation Treatment
Default: 0
Settings
0: Warn and continue operation
1: Fault and ramp to stop
2: Fault and coast to stop
3: No warning
 Pr.07-29–Pr.07-31 set the allowable slip level/time and the over-slip treatment when the drive is
running.

07-32
Motor Oscillation Compensation Factor
Default: 1000
Settings
0–10000
 If there are current wave motions which cause severe motor oscillation in some specific area,
setting this parameter can effectively improve this situation. (Set this parameter to 0. When the
current wave motion occurs in low frequency and high power, increase the value for Pr.07-32.)

07-33
Auto-restart Interval of Fault
Default: 60.0
Settings
0.0–6000.0 sec.
 When a reset/restart occurs after a fault, the drive uses Pr.07-33 as a timer and starts counting
the number of faults within this time period. Within this period, if the number of faults does not
exceed the setting for Pr.07-11, the counting clears and starts from 0 when the next fault occurs. 
07-38
PMSVC Voltage Feed Forward Gain
Default: 1.00
Settings
0.50–5.00
 Adjust the PMSVC voltage feedback forward gain, and to meet the demand of rapid feedback
application.
 Pr.07-38 = 1.00 means forward feedback = Ke × motor rotor speed
 Refer to Section 12-2 “PMSVC adjustment” for detail.
07-46
OOB Sampling Time
Default: 1.0
Settings
0.1–120.0 sec.

Delta VFD4A8MS21ANSAA Specifications

General

Brand	Delta
Model	VFD4A8MS21ANSAA
Category	DC Drives
Language	English