Operation From Controller - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Operation from controller

For the system using the incremental linear encoder, the magnetic pole detection is automatically performed at the first servo-
on after the power-on. For this reason, when performing the positioning operation, create the sequence which surely confirms
the servo-on status as the inter lock condition of the positioning command.
Function
Linear servo control error detection function
For the linear servo control error detection function, the position and speed deviation error detections are
enabled by default. ([Pr. PL04]: _ _ _ 3)
If the linear servo control becomes unstable for some reasons, 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 different detection methods: the position deviation, speed deviation,
and thrust deviation. An error is detected when each method is enabled with [Pr. PL04 Linear servo motor/DD motor function
selection 2]. The detection level can be changed with [Pr. PL05], [Pr. PL06], and [Pr. PL07].
■Outline of linear servo control error detection function
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] to "_ _ _ 1" to enable the position deviation error detection.
[Pr. PL04]
1
Position deviation error detection enabled
When the difference between 1) and 2) in figure 14.1 is equal to or more than the value of [Pr. PL05 Position deviation error
detection level] (1 mm to 1000 mm), [AL. 42.1 Servo control error by position deviation] occurs and the linear servo motor
stops. The initial value of this detection level is 50 mm. Change the setting value as necessary.
For "Outline of linear servo control error detection function", refer to the following.
Page 486 Outline of linear servo control error detection function
14 USING A LINEAR SERVO MOTOR
486
14.3 Operation and functions
Linear servo motor
Linear encoder