YASKAWA SGDV-OCA05A

10.3 Parameter Settings for Fully-Closed Loop Control
10.3.7 Analog Monitor Signal Settings
10
Fully-Closed Loop Control
10-9
 Setting Example
Increase the value if the belt slips or is twisted excessively.
If this parameter is set to 0, the external encoder value will be read as it is.
If you use the default setting of 20, the second rotation will start with the deviation for the first
Servomotor rotation multiplied by 0.8.
 Related Parameters
10.3.7 Analog Monitor Signal Settings
You can monitor the position deviation between the Servomotor and load with an analog moni-
tor.
10.3.8 Setting to Use an External Encoder for Speed Feedback
For fully-closed loop control, you normally set a parameter to specify using the motor encoder
speed (Pn22A = n.0).
If you will use a Direct Drive Servomotor and a high-resolution external encoder, set the param-
eter to specify using the speed of the external encoder (Pn22A = n.1).
Note: This parameter cannot be used if Pn002 is set to n.0 (Do not use external encoder).
Pn52A
Multiplier per Fully-closed Rotation
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 100 1% 20 Immediately Setup
Pn52A = 0
Pn52A = 100
Pn52A = 20
Deviation between Servomotor and external encoder
Large
Number of Servomotor rotations
4th rotation3rd rotation
1st rotation
2nd rotation
Small
Parameter Name Meaning
When
Enabled
Classifi-
cation
Pn006 n.07
Analog Monitor 1
Signal Selection
Position deviation between motor and load
(output unit: 0.01 V/reference unit).
Immedi-
ately
Setup
Pn007 n.07
Analog Monitor 2
Signal Selection
Position deviation between motor and load
(output unit: 0.01 V/reference unit).
Parameter Meaning
When
Enabled
Classification
Pn22A
n.0
(default setting)
Use motor encoder speed.
After restart Setup
n.1 Use external encoder speed.