6-18
6-5 Encoder Dividing Function
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
6
Applied Functions
Precautions for Correct Use
The maximum output frequency of the pulse regeneration output will be 4 Mpps (after quadruple
multiplier). If operated at a speed that exceeds this, the regeneration function may not operate
properly and position misalignment may result.
- You can generate Alarm 28.0 "pulse regeneration error" when the pulse regeneration limit is
reached based on the Pulse Regeneration Output Limit Setting (Pn533). Note that this alarm
is generated when the pulse regeneration output limit is detected. Therefore, the alarm does
not occur due to the maximum output frequency. Depending on the motor rotation status
(uneven rotations), the alarm may occur when the detection is made at the frequency that
goes up momentarily.
- Take not that if the encoder is used as the output source and the pulse output resolution per
rotation is not a multiple of 4, phase Z and phase A are not synchronized, and the width may
be narrow.
Note: When Pn503 = 0 and the output resolution is set to Pn011, the dividing ratio is always a multiple of 4.
When en encoder with the incremental specifications is used, the first phase Z output after the
power supply is turned ON may not always be within the above pulse width. When you are using
the phase-Z signal, rotate the motor more than once after turning ON the power supply, and
confirm that phase-Z regeneration has been performed once before using the second and
subsequent phase Z outputs.
Phase A
Phase B
0.25
μ
s or more
Phase A
Phase B
Phase Z
When the dividing ratio is multiple of 4
Phase A
Phase B
Phase Z
When the dividing ratio is not multiple of 4
*
Will not be synchronized
with phase A.
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