
B-65150E/04 4. SERVO FUNCTION DETAILS
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(3) Setting parameters
<1> Enable PI control and the feed-forward function.
#7 #6 #5 #4 #3 #2 #1 #0
1808 8X03 PIEN
2003 1003
PIEN (#3) 1: To enable PI control
#7 #6 #5 #4 #3 #2 #1 #0
1883 8X05 FEED
2005 1005
FEED (#1) 1: To enable the feed-forward function
<2> Specify the feed-forward coefficient.
1961 8X68 Feed-forward coefficient (FALPH)
2068 1068
For Series 0-C, 15-A
8192
FALPH = α × 4096 ×
Position feedback pulses
per revolution of the motor
For Series 15-B, 16, 18, 20, 21, Power Mate
FALPH = α × 100 or α × 10000
When FALPH is smaller than or equal to 100: In units of 1%
When FALPH is greater than 100: In units of 0.01%
[Typical setting] 70 or 7000
<3> Specify the velocity feed-forward coefficient.
1962 8X69 Velocity feed-forward coefficient (VFFLT)
2069 1069
For Series 0-C, 15-A
Load inertia +
rotor inertia 0.04 × 8000
VFFLT = (− PK2V) ××
Rotor inertia Position feedback
pulses per revolution of
the motor
For Series 15-B, 16, 18, 20, 21, Power Mate
VFFLT = 50 (50 to 200)