6-16
6-5 Encoder Dividing Function
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
6
Applied Functions
ABZ Parallel External Scale
Phase Z is output without dividing the Z signal that is input from the ABZ parallel external scale.
When the Phase-AB External Scale Pulse Output Method Selection (Pn622) = 1, the phase-AB
signal can be loaded to the amplifier and regenerated.Note, in this case, that the phase-AB
regeneration will be delayed compared to when Pn622 is set to 0.
External Scale Common Items
When detection cannot be made because the phase-Z signal width is narrow due to the external
scale travel distance, if you set the phase-Z signal output time in the External Scale-Z Setting
(Pn620), phase Z can be output at least for that period of time.
In addition, take note that the output is made from when the phase-Z signal starts and, therefore,
it will be different from the actual phase-Z signal width.Take note, also, that the direction of the
time extension varies depending on the direction of the operation.
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 Err28.0 "pulse regeneration error" when the pulse regeneration limit is
reached based on the Pulse Regeneration Output Limit Setting (Pn533).Note that this error is
generated when the pulse regeneration output limit is detected. Therefore, the error does not
occur due to the maximum output frequency.Depending on the motor rotation status (uneven
rotations), the error 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.
Phase-Z output for pulse regeneration
(before time extension)
Phase-Z output for pulse regeneration
(after time extension)
Pn620 External Scale Phase-Z Setting
Pn620 External Scale Phase-Z Setting
Operating direction
Operating direction
Phase A
Phase B
0.25
μ
s or more