Omron R88D-KTA5L User Manual page 369

External Feedback Pulse Error Setting (Pn328, Pn329)
The difference between the encoder position and external encoder position is detected, and if
the difference exceeds the value of Internal/External Feedback Pulse Error Counter Overflow
Level (Pn328), an alarm 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
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 encoder due to slipping, etc, and
internal/external feedback pulse errors accumulate.
Amount of internal/external feedback pulse error
[command unit]
Pn328 Internal/External Feedback Pulse Error Counter Overflow Level
Pn329
Internal/External Feedback
Pulse Error Counter Reset
Precautions for Correct Use
 An internal/external feedback pulse error counter overflow level error occurs when the external
encoder is abnormal, connection is wrong, or connection point between the motor and load is
loose, among others. Accordingly, check these items when an alarm 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.
 Take sufficient safety measures, such as installing limit sensors.
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Parameter name
Internal/External Set the allowable difference (hybrid error)
Feedback Pulse between the encoder-detected position
Error Counter and external encoder-detected position
Overflow Level in command units.
Internal/External The hybrid error becomes 0 every time
Feedback Pulse the motor rotates by the set value. If the
Error Counter set value is 0, the hybrid error is not
Reset cleared.
Cleared to 0
Pn329
Internal/External Feedback
Pulse Error Counter Reset
5-6 Fully-closed Control
Explanation
Error detected
Cleared to 0
Pn329
Internal/External Feedback
Pulse Error Counter Reset
Setting
Unit
range
Command
27
1 to 2
units
0 to 100 Rotations
Number of motor
rotations [rotations]
5-34
5