Yaskawa VS-626 MC5 - Manual (Page 83)

Setting User Constants
4.2.5 Initialize Mode
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J Setting the Control Method: A1-02
D Use constant A1-02 to select one of the four control methods.
D This user constant is not returned to the factory setting when constants are initialized. It must be manu-
ally reset to the factory setting.
D When using winding change function, the setting of constants A1-02 and E3-01 (motor 2 control selec-
tion) should be the same.
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
A1-02
Control method selec-
tion
2 3 --
2
(Open Loop
Vector)
Q Q
Control Method Settings
Setting Function
2 Open-loop vector control
(Vector control using the Inverter internal speed information).
3 Flux vector control
(Vector control using a PG Speed Control Card).
Changing the Control Method to Flux Vector
Use the following procedure to change the control method to select flux vector.
Step Key Sequence Digital Operator Display Remarks
1
MENU
MC5 Main Menu
Operation
2 MC5 Main Menu
Initialize
3 DATA
ENTER
Select language
English
4
Press twice.
Control Method
Open Loop
5 DATA
ENTER
A1--02 = 2
Open Loop
Changed to constant setting level.
6 A1--02 = 3
Flux Vector
7 DATA
ENTER Entry Accepted
Writes-in the new setting.
Control Method
Flux Vector
After a few seconds, the Operator dis-
play is as shown on the left.
The control method has been changed to flux vector.
Table
4.4 Control Method Characteristics
Characteristic Open Loop Vector Control Flux Vector Control
Basic Control Method Current vector control without PG Current vector control with PG
Speed Detector Not required Required (pulse generator)
Optional Speed
Detectors Not required PG-B2 or PG-X2
Speed Control
Accuracy
1:100 1:1000
Starting Torque 150%/1 Hz 150 %/0 r/min
Speed Control Range 0.2% 0.02%
Torque Limit Possible Possible
Torque Control Not possible Possible
Example Applications
S Variable speed drive applications. S Simple servo drives.
S Precision speed control.
S Torque control.
4
A EXAMPLE "