4-130
4-3 Functions When PG Option Board (3G3AX-PG01) Is Used
4
Functions
Note: Below are the block diagrams of the electronic gear function.
*1. It is recommended that position control feedfoward gain adjustment should be started with P022 = 2.00. To
reduce the position deviation between the main and sub motors, increase the feedforward gain. If motor
hunting occurs, reduce the feedforward gain.
*2. It is recommended that position loop gain adjustment should be started with P023 = 2.00. To increase
positioning accuracy and holding power, increase the position loop gain. If an increased position loop gain
causes hunting, reduce the position loop gain.
*3. Make sure that the N/D setting is within the range of 1/50 N/D 20.
(N: Electronic gear ratio numerator [P020], D: Electronic gear ratio denominator [P021])
Example: Synchronous Operation
For the Inverter (master Inverter) on the main motor side, you can select either the speed control or
pulse train position control mode.
For the Inverter (slave Inverter) on the sub motor side, you need to select the pulse train position
control mode.
P019 = 00 (FB)
P019 = 01 (REF)
Position
command
N
D
1
1+sT
Position feedback
Electronic gear
Position control feedforward gain
First-order lag filter
P022
P023
Speed
command
Position loop gain
Position
command
N
D
Position feedback
Electronic gear
Position control feedforward gain
P022
P023
Speed
command
Position loop gain
1
1+sT
First-order lag filter
Master Inverter
AP, BP
AN, BN
EG5
EAP, EBP
EAN, EBN
SAP, SBP
SAN, SBN
EG5
EAP, EBP
EAN, EBN
Slave Inverter
M
EC
Main
motor
M
EC
Sub
motor
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