Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 36

[Pr.304] Servo input axis rotation direction restriction
Set this parameter to restrict the input travel value for the servo input axis to one direction.
This helps to avoid reverse operation caused by machine vibration, etc. when "Real current value" or "Feedback value" is
used as input values.
Setting value
0: Without rotation direction
restriction
1: Enable only for current value
increase direction
2: Enable only for current value
decrease direction
The input travel value in the opposite direction of the enable direction accumulates as a rotation direction restricted amount,
and will be reflected when the input travel value moves in the enabled direction again. Therefore, the current value of servo
input does not deviate when the reverse operation is repeated.
The rotation direction restricted amount is set to 0 at the following timing.
• At home position return complete
• At current value change complete
• At speed control () complete
• At fixed-pitch feed control start
• At servo amplifier connection/disconnection
• At speed/position switching control start
*1 When the control is started by turning OFF the "[Rq.1152] Feed current value update command (R: M34492+32n/Q: M3212+20n)".
For "1: Enable only for current value increase direction" is set in "[Pr.304] Servo input axis rotation
direction restriction".
Speed before rotation direction
restriction
[Md.301] Servo input axis speed
(R: D35442+16n, D35443+16n/
Q: D12282+10n, D12283+10n)
(Speed after rotation direction
restriction)
[Md.303] Servo input axis
rotation direction restriction
amount
(R: D35446+16n, D35447+16n/
Q: D12286+10n, D12287+10n)
4 INPUT AXIS MODULE
34
4.1 Servo Input Axis
Description
Rotation direction restriction is not executed.
Enable only the input travel value in the increasing direction of the servo input axis current value.
Enable only the input travel value in the decreasing direction of the servo input axis current value.
*1
*1
The input travel value is accumulated as a rotation
direction restricted amount, and will be reflected when
the input travel value moves in the enable direction.
t
t
t