Omron R88M-K Series User Manual page 470

8-4 Analog Control Parameters
Explanation of Set Values
Set value
0
1
2
*1. These are the directions in which the Servo Drive counts the pulses from a 90° phase difference
 For the external encoder connection direction, set the direction so that count-up occurs when the motor
shaft is rotating counterclockwise, and count-down occurs when the motor shaft is rotating clockwise.
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 encoder count direction becomes opposite to the count direction
used for monitoring the total external encoder feedback pulses, etc.
If Pn000 = 0, the count direction matches the count direction for monitoring.
8
Even when the speed command is within the Drive's speed command range, an acceleration error
will occur if the speed command exceeds the maximum speed of motor shaft rotation.
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 encoder 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 encoder 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 or 1
range
8-35
90° phase difference output type *
Incremental encoder with serial communications
Reserved (Do not use this setting.)
output type external encoder.
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 [pulses]
=
Pn325 External encoder resolution per motor rotation [pulses]
Unit
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Description
1
Count-up direction
EXA
EXB
EXB is 90° behind EXA.
t1 > 0.25 μs
t2 > 1.0 μs
Default
−
setting
Default
−
setting
Default
−
setting
t1
t2
Fully-closed
Power OFF
0
and ON
Fully-closed
Power OFF
10000
and ON
Fully-closed
Power OFF
0
and ON
Yes
Yes
Yes