Omron ACCURAX G5 User Manual page 298

5-6 Full Closing Control
External Feedback Pulse Error Setting (Pn328, Pn329)
The difference between the encoder position and external scale position is detected, and if the
difference exceeds the value of Internal/External Feedback Pulse Error Counter Overflow
Level (Pn328), an error will occur.
Parameter
number
Pn328
Pn329
Pn329: Internal/External Feedback Pulse Error Counter Reset
Every time the motor rotates for the amount set by Pn329, the internal/external feedback pulse
5
error is cleared.
This function can be used when there is deviation between the position calculated from
encoder pulses and the position calculated from external scale due to slipping, etc, and
internal/external feedback pulse errors accumulate.
Amount of internal/external feedback pulse error
[command unit]
An internal/external feedback pulse error counter overflow level error occurs when the external
scale is abnormal, connection is wrong, or connection point between the motor and load is loose,
among others. Accordingly, check these items when an error occurs.
Be sure to set an appropriate value for Internal/External Feedback Pulse Error Counter Reset
(Pn329). If an extremely small value is set, this function may not operate.
Use with extra caution on safety by installing limit sensors, etc.
5-32
Parameter name
Internal/External
Feedback Pulse
Error Counter
Overflow Level
Internal/External
Feedback Pulse
Error Counter
Reset
Pn328 Internal/External Feedback Pulse Error Counter Overflow Level
Pn329
Internal/External Feedback
Pulse Error Counter Reset
Precautions for Correct Use
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Explanation
Set the allowable difference (hybrid error)
between the encoder-detected position
and external scale-detected position in
the command unit.
The hybrid error becomes 0 every time
the motor rotates by the set value. If the
set value is 0, the hybrid error is not
cleared.
Error detection
0 clear
Pn329 Pn329
Internal/External Feedback Internal/External Feedback
Pulse Error Counter Reset Pulse Error Counter Reset
Setting
range
27
1 to 2
0 to 100
0 clear
Number of motor
rotations [rotation]
Unit
Command
unit
Rotation