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Mitsubishi Electric QD77MS User Manual Page 54

Simple motion module.
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[Pr.302] Servo input axis phase compensation advance time
Set the time to advance or delay the phase (input response) of the servo input axis.
Refer to Section 4.8 "Phase compensation function" for the peculiar time delay of the
system using the servo input axis.
1 to 2147483647 [μs] ............... Advance the phase (input response) according to the
0 [μs] ........................................ Do not execute phase compensation.
-2147483648 to -1 [μs] ............ Delay the phase (input response) according to the setting
If the setting time is too long, the system experiences overshoot or undershoot at
acceleration/deceleration of the input speed. In this case, set longer time to affect the
phase compensation amount in "[Pr.303] Servo input axis phase compensation time
constant".
[Pr.303] Servo input axis phase compensation time constant
Set the time constant to affect the phase compensation amount for the first order delay.
63 [%] of the phase compensation amount are reflected in the time constant setting.
Servo input axis
current value
Speed before phase
compensation
Speed after phase
compensation
Md.302
Servo input axis
phase compensation
amount
Pr.303
Servo input axis phase
compensation time constant
setting time.
time.
Pr.302
Servo input axis
phase compensation
advance time
Speed before phase
compensation
63%
2 - 6
Chapter 2 Input Axis Module
Current value after phase compensation
Current value before phase compensation
Servo input axis phase
Pr.302
compensation advance time
63%
Pr.303
Servo input axis phase
compensation time constant
t
t
t
t

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