8-34
8-4 Analog Control Parameters
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
8
Parameters Details
Check the number of encoder pulses per motor rotation and number of external scale pulses per
motor rotation, and set External Feedback Pulse Dividing Numerator (Pn324) and External
Feedback Pulse Dividing Denominator (Pn325).
If this ratio is incorrect, the deviation between the position calculated from encoder pulses and
position calculated from external scale pulses will increase. Particularly when the moving distance
is long, an excessive deviation error will occur.
Set Pn324 to 0 to have encoder resolution automatically set as numerator.
Explanation of Set Values
Explanation of Set Values
Set the allowable difference (feedback pulse error) between the motor (encoder) position and load
(external scale) position in command units.
Pn324
External Feedback Pulse Dividing Numerator
Setting
range
0 to 2
20
Unit
−
Default
setting
0
Power OFF
and ON
Yes
Full closing
Pn325
External Feedback Pulse Dividing Denominator
Setting
range
1 to 2
20
Unit
−
Default
setting
Power OFF
and ON
Yes
Full closing
=
Encoder resolution per motor rotation [pulse]
External scale resolution per motor rotation [pulse]
Pn324
Pn325
Pn326
External Feedback Pulse Direction Switching
Setting
range
0 to 1
Unit
−
Default
setting
Power OFF
and ON
Yes
Full closing
Set
value
Explanation
0
External scale feedback pulse count direction non-reverse
1
External scale feedback pulse count direction reverse
Pn327
External Feedback Pulse Phase-Z Setting
Setting
range
0 to 1
Unit
−
Default
setting
Power OFF
and ON
Yes
Full closing
Set
value
Explanation
0
Phase-Z disconnection detection enabled
1
Phase-Z disconnection detection disabled
Pn328
Internal/External Feedback Pulse Error Counter Overflow Level
Setting
range
1 to 2
27
Unit
Command unit
Default
setting
Power OFF
and ON
Yes
Full closing