Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 351

Linear servo control error detection function
If the linear servo control becomes unstable for some reason, the linear servo motor may not operate properly. To detect this
state and to stop operation, the linear servo control error detection function is used as a protective function.
The linear servo control error detection function has three types of detection methods: the position deviation, speed deviation,
and thrust deviation. An error is detected when each method is enabled with [Pr. PL04.0 [AL. 042 Servo control error]
detection function selection]. The detection level can be changed with [Pr. PL05 Position deviation error detection level], [Pr.
PL06 Speed deviation error detection level], and [Pr. PL07 Torque deviation error detection level].
Precautions
• For the linear servo control error detection function, the position and speed deviation error detections are enabled before
shipping. ([Pr. PL04.0]: 3)
Linear servo control error detection selection function
Select the linear servo control error detection function.
• [Pr. PL04.0 [AL. 042 Servo control error] detection function selection]
Refer to the following table.
Setting value Position deviation error detection
1 Enabled
2 Disabled
3 Enabled
4 Disabled
5 Enabled
6 Disabled
7 Enabled
Initial value: 3
Servo amplifier
Servo amplifier internal value
(1) Model feedback position [mm]
(3) Model feedback speed [mm/s]
(5) Command thrust [%]
Linear encoder
(2) Feedback position [mm]
(4) Feedback speed [mm/s]
(6) Feedback thrust [%]
■Position deviation error detection
Set [Pr. PL04.0 [AL. 042 Servo control error] detection function selection] to "1" to enable the position deviation error
detection.
Servo parameter
PL04.0
If the difference between the model feedback position (1) and the feedback position (2) in the figure is equal to or more than
the value of [Pr. PL05 Position deviation error detection level] (1 mm to 1000 mm), [AL. 042.1 Servo control error by position
deviation] will occur and the linear servo motor will stop. The initial value of this detection level is 50 mm. Change the setting
value as necessary.
Speed deviation error detection
Disabled
Enabled
Enabled
Disabled
Disabled
Enabled
Enabled
Linear servo motor
Description
[AL. 042 Servo control error] detection function selection
1: Position deviation error detection enabled
Thrust deviation error detection
Disabled
Disabled
Disabled
Enabled
Enabled
Enabled
Enabled
Linear encoder
10 USING A LINEAR SERVO MOTOR
10.4 Basic functions
10
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