Delta Electronics VFD-E manual 07.06, 07.07, 07.08, 07.09, 07.10, 07.11, 07.12, 07.14

Chapter 4 Parameters

The motor auto tune procedure will set this parameter. The user may also set this parameter

without using Pr.07.04.

07.06	Motor Rated Slip (Motor 0)		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) = Fbase (Pr.01.01 base frequency) – (rated rpm x motor pole 120)

07.07	Slip Compensation Limit		Unit: 1
	Settings	0 to 250%	Factory Setting: 200

This parameter sets the upper limit of the compensation frequency (the percentage of Pr.07.06).

Example: when Pr.07.06=5Hz and Pr.07.07=150%, the upper limit of the compensation frequency is 7.5Hz. Therefore, for a 50Hz motor, the max. output is 57.5Hz.

07.08	Torque Compensation Time Constant		Unit: 0.01
	Settings	0.01 ~10.00 sec	Factory Setting: 0.10
07.09	Slip Compensation Time Constant		Unit: 0.01
	Settings	0.05 ~10.00 sec	Factory Setting: 0.20

Setting Pr.07.08 and Pr.07.09 changes the response time for the compensations.

Too long time constants give slow response; too short values can give unstable operation.

07.10	Accumulative Motor Operation Time (Min.)			Unit: 1
	Settings	0~1439		Factory Setting: 0
07.11	Accumulative Motor Operation Time (Day)			Unit: 1
	Settings	0 ~65535		Factory Setting: 0
Pr.07.10 and Pr.07.11 are used to record the motor operation time. They can be cleared by
setting to 0 and time is less than 1 minute is not recorded.
07.12	Motor PTC Overheat Protection			Unit: 1
				Factory Setting: 0
	Settings	0	Disable
		1	Enable
07.14	Motor PTC Overheat Protection Level			Unit: 0.1

4-98 Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11