Delta VFD-B User Manual

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.

Delta VFD-B Specifications

General

Series	VFD-B
Power Range	0.4kW to 15kW
Control Method	V/F Control, Sensorless Vector Control
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Communication	RS-485
Protection Features	Over-voltage, Over-current, Overheat, Under-voltage, Ground fault, Short circuit