Mitsubishi Electric Q173DSCPU Programming Manual page 86

5 INPUT AXIS MODULE
(5) [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.
• 0: Without rotation direction restriction ........................Rotation direction
• 1: Enable only for current value increase direction .....Enable only the input travel
• 2: Enable only for current value decrease direction ....Enable only the input travel
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.
1) At home position return complete
2) At current value change complete
3) At speed control ( ) complete (when the control is started by turning OFF the
feed current value update command (M3212+20n))
4) At fixed-pitch feed control start
5) At servo amplifier connection/disconnection
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.300] Servo input axis speed
(D12280+10n, D12281+10n)
(Speed after rotation direction
restriction)
[Md.303] Servo input axis
rotation direction restriction
amount
(D12286+10n, D12287+10n)
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.
5 - 7
restriction is not executed.
value in the increasing
direction of the servo input
axis current value.
value in the decreasing
direction of the servo input
axis current value.
t
t
t