Yaskawa V7 High HP - Manual (Page 6)

Date: 03/29/05, Rev: 05-03 Page 6 of 8 TM.V7SW.026H
4. Function explanation
(1) Maximum output frequency
The maximum output frequency is 800Hz.
(2) Carrier frequency
The carrier frequency is fixed at 5kHz.
There is no parameter to set the carrier frequency (n080 in standard software).
(3) Setting unit for frequency related parameters
Fixed at 0.1Hz.
There is no parameter to change the setting/display unit (n035).
(Soft starter internal calculation resolution is 0.001Hz).
(4) Display unit for frequency reference/output frequency monitors
Fixed at 0.1Hz.
There is no parameter to change the setting/display unit (n035).
(5) Memobus frequency reference/monitor unit
It is possible to select 0.1Hz/1, 100%/30000 and 0.1%/1 by parameter n152.
0.01Hz/1 (n152 = 1 in standard software) cannot be set.
(6) Control mode
Control mode is fixed at V/f.
Parameters related to VVC are removed.
• The deleted parameters are shown below.
Control mode selection (n002), Overtorque detection function selection 2 (n097), Motor leakage
inductance (n108), Torque compensation voltage limit (n109), Slip compensation during
regenerative operation (n113).
(7) Torque compensation
The amount of torque compensation is decreased proportionally to output frequency as follows.
The amount of torque compensation is a percentage of parameter n103 (Torque compensation gain).
120Hz 160Hz
Output Frequency
Amount of torque
compensation
100%