Yaskawa VS-626 MC5 - Manual (Page 162)

Advanced Operation
7.3.3 Reference Constants: d
- 24
J Carrier Frequency: C6-01
D The carrier frequency characteristics differ according to the control method.
x Open-loop vector control and flux vector control: Constant frequency (The carrier frequency up-
per limit only is set.)
D The carrier frequency does not normally need to be adjusted, but make adjustments in the following
cases:
x If the wiring distance between the Inverter and the motor is long, lower the carrier frequency.
Wiring Distance 50 m max. 100 m max. Over 100 m
Carrier Frequency 15 kHz max. 10 kHz 5 kHz max.
x If there are great irregularities in speed or torque, lower the carrier frequency.
User Change
during Setting Factory
Valid Access Levels User
Constant
Number
Name
during
Opera-
tion
Setting
Range Unit
Factory
Setting Open Loop
Vector
Flux Vector
C6-01
Carrier frequency upper
limit
2.0 to 15.0 kHz 15.0 * B B
* The setting range and the factory setting vary according to the Inverter capacity. The table
shows a value of 200 V class, 0.4 kW. (See page NO TAG.)
D In the vector control modes, the carrier frequency is determined by the carrier frequency upper limit
(constant C6-01).
7.3.3 Reference Constants: d
J Frequency Reference Function: d2-01, d2-02
D The frequency reference function sets the output frequency upper and lower limits.
D When the frequency reference is zero and a run command is input, the motor operates at the frequency
reference lower limit (d2-02). The motor will not operate, however, if the lower limit is set lower than
the minimum output frequency (E1-09).
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Numberc Name
during
Opera-
tion
Setting
Range Unit
Factory
Setting Open Loop
Vector
Flux Vector
d2-01
Frequency reference up-
per limit
0.0 to 110.0 % 100.0 B B
d2-02
Frequency reference
lower limit
0.0 to 109.0 % 0.0 B B
D The frequency reference upper and lower limits are set as a percentage of the maximum output fre-
quency (E1-04), in increments of 1%.
D The upper and lower limits of the frequency reference are shown in Figure 7.13.
Set frequency reference
Internal frequency reference
Frequency reference
upper limit (d2-01)
Frequency reference
lower limit (d2-02)
Fig
7.13 Upper and Lower Limits of the Frequency Reference
7