Omron ACCURAX G5 User Manual page 400

8-4 Analog Control Parameters
Explanation of Set Values
Set value
0
1
2
*1. The driver internal process count direction relative to the external scale of phase-AB output type is
For the external scale connection direction, set the direction so that count-up occurs when the motor
shaft is rotating in the CCW direction, and count-down occurs when the motor shaft is rotating in the
CW direction If the connection direction cannot be selected due to installation conditions, etc., the count
direction can be reversed using External Feedback Pulse Direction Switching (Pn326).
Take note that if Pn000 = 1, the scale count direction becomes opposite to the count direction used
for monitoring the total external scale feedback pulses, etc.
If Pn000 = 0, the count direction matches the count direction for monitoring.
8
Even when the driver speed is within the specified range, an acceleration error will occur if the
motor shaft rotation speed exceeds the maximum speed.
Pn324
External Feedback Pulse Dividing Numerator
Setting
0 to 2
range
Pn325
External Feedback Pulse Dividing Denominator
Setting
1 to 2
range
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.
Pn326
External Feedback Pulse Direction Switching
Setting
0 to 1
range
8-34
Phase-AB output type *
Serial communications type (Incremental encoder specifications)
Serial communications type (Absolute encoder specifications)
explained below.
Count-down direction
t1
EXA
EXB
t2
EXB is 90° ahead of EXA.
t1 > 0.25 μs
t2 > 1.0 μs
20
Unit
20
Unit
Pn324 Encoder resolution per motor rotation [pulse]
=
Pn325 External scale resolution per motor rotation [pulse]
Unit
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Explanation
1
Count-up direction
EXA
EXB
EXB is 90° behind EXA.
Default
−
setting
Default
−
setting
Default
−
setting
t1
t2
t1 > 0.25 μs
t2 > 1.0 μs
Full closing
Power OFF
0
and ON
Full closing
Power OFF
10000
and ON
Full closing
Power OFF
0
and ON
Yes
Yes
Yes