YASKAWA GA800 Programming Manual page 270

2.4 C: Tuning
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 Specifications (200 V Class)" and
"Model Specifications (400 V Class)" for more information about rated output current.
Table 2.34 Differences between Heavy Duty Rating and Normal Duty Rating
Item
C6-01 Setting
Load Characteristics
A high overload tolerance is necessary during start up, acceleration,
deceleration, and equivalent conditions.
• Extruder
Application
• Conveyor
• Constant torque or high overload capacity are necessary.
Overload Tolerance
Stall Prevent Level during Accel
Stall Prevent Level during Run
Carrier Frequency
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.
Name
(Hex.)
C6-02 Carrier Frequency Selection
(0224)
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 AOLV/PM)
3 : 8.0 kHz (6.0 kHz AOLV/PM)
4 : 10.0 kHz (8.0 kHz AOLV/PM)
5 : 12.5 kHz (10.0 kHz AOLV/PM)
270
Heavy Duty Rating (HD)
0
150% - 60 seconds
150%
150%
2 kHz
V/f CL-V/f OLV CLV AOLV
Sets the carrier frequency for the transistors in the drive.
Normal Duty Rating (ND)
Overload tolerance is not necessary.
• Fan
• Pump
• Blower
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
1
110% - 60 seconds
110%
110%
2 kHz Swing-PWM
Default
(Range)
Determined by A1-02, C6-
01, and o2-04
(Determined by A1-02)