Chapter 5 Parameters
|
VFD-B Series
Revision July 2008, BE16, SW V4.08 & V5.00
5-73
07 - 08
Motor Rated Slip
Unit: 0.01
Settings
0.00 to 20.00Hz
Factory Setting: 3.00
Refer to the rated rpm and the number of poles on the nameplate of the motor and use the
following equation to calculate the rated slip.
Rated Slip (Hz) = F
base
(Pr.01-01 base frequency) - (rated rpm x motor pole 120)
This parameter is valid only in vector mode.
07 - 09
Slip Compensation Limit
Unit: 1
Settings
00 to 250%
Factory Setting: 200
This parameter sets the upper limit of the compensation frequency (the percentage of Pr.07-
08).
Example: when Pr.07-08=5Hz and Pr.07-09=150%, the upper limit of the compensation
frequency is 7.5Hz. Therefore, for a 50Hz motor, the max. output is 57.5Hz.
07 - 10
Reserved
07 - 11
Reserved
07 - 12
Torque Compensation Time Constant
Unit: 0.01
Settings
0.01 ~10.00 sec
Factory Setting: 0.05
07 - 13
Slip Compensation Time Constant
Unit: 0.01
Settings
0.05 ~10.00 sec
Factory Setting: 0.10
Setting Pr.07-12 and Pr.07-13 changes the response time for the compensation.
When Pr.07-12 and Pr.07-13 are set to 10.00 sec, its response time for the compensation will
be the longest. But if the settings are too short, unstable system may occur.
07 - 14
Accumulative Motor Operation Time (Min.)
Unit: 1
Settings
00 ~1439
Factory Setting: 00
07 - 15
Accumulative Motor Operation Time (Day)
Unit: 1
Settings
00 ~65535
Factory Setting: 00
Pr.07-14 and Pr.07-15 are used to record the motor operation time. They can be cleared by
setting to 00 and time is less than 60 seconds is not recorded.
