12.4 C: Tuning
792 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
The overload tolerance is 110% of the rated output current for 60 seconds.
There are two types of load ratings for this product depending on the load characteristics of the application: Heavy
Duty Rating (HD) and Normal Duty Rating (ND).
The drive rated output current, overload tolerance, and acceleration stall prevention level change when the duty rating
changes. Set the drive to agree with the duty rating of the selected drive capacity. In HD, the tolerance is 150%
overload for 60 seconds. In ND, the tolerance is 110% overload for 60 seconds. The rated output current for ND
drives is higher than the rated output current for HD drives. Refer to “Model-Specific Specifications“ for more
information about the rated output current.
Table 12.34 Differences between Heavy Duty Rating and Normal Duty Rating
Item Heavy Duty Rating (HD) Normal Duty Rating (ND)
C6-01 Setting 0 1
Load Characteristics
Application
A high overload tolerance is necessary during start up, acceleration,
deceleration, and equivalent conditions.
• Extruder
• Conveyor
• Constant torque or high overload capacity are necessary.
Overload tolerance is not necessary.
• Fan
• Pump
• Blower
Overload Tolerance 150% - 60 seconds 110% - 60 seconds
Stall Prevent Level during Accel 150% 110%
Stall Prevent Level during Run 150% 110%
Carrier Frequency 2 kHz 2 kHz Swing-PWM
Note:
• Set the stall prevention level during acceleration with L3-02 and the stall prevention level during run with L3-06.
• Changing C6-01 also changes the maximum capacity of applicable drive motors. The drive automatically changes the setting values E2-xx
and E4-xx to applicable values. The drive also automatically changes these parameters that depend on motor output:
–b8-04 [Energy Saving Coefficient Value]
–C5-17 [Motor Inertia]
–C5-37 [Motor 2 Inertia]
–L2-03 [Minimum Baseblock Time]
–L3-24 [Motor Accel Time @ Rated Torque]
–n5-02 [Motor Inertia Acceleration Time]
■ C6-02: Carrier Frequency Selection
No.
(Hex.)
Name Description
Default
(Range)
C6-02
(0224)
Carrier Frequency Selection
Sets the carrier frequency for the transistors in the drive.
Determined by A1-02, C6-
01, and o2-04
(Determined by A1-02)
Changes to the switching frequency will decrease audible noise and decrease leakage current.
Note:
Increasing the carrier frequency to more than the default setting will automatically decrease the drive current rating.
1 : 2.0 kHz
2 : 5.0 kHz (4.0 kHz for AOLV/PM)
3 : 8.0 kHz (6.0 kHz for AOLV/PM)
4 : 10.0 kHz (8.0 kHz for AOLV/PM)
5 : 12.5 kHz (10.0 kHz for AOLV/PM)
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