Functions; Fully Closed Loop Control Error Detection - Mitsubishi Electric MR-J3-B-RJ006 Instruction Manual

4. OPERATION AND FUNCTIONS

4.4 Functions

4.4.1 Fully closed loop control error detection

If fully closed loop control becomes instable for some reason, the speed at servo motor side may increase
abnormally.
The fully closed loop control error detection function is a protective function designed to pre-detect it and stop
operation.
The fully closed loop control error detection function has two different detection methods, speed difference and
position difference, and errors are detected only when the corresponding functions are made valid by setting
Fully closed loop function selection (parameter No.PE03).
The detection level setting can be changed using the parameters (No.PE06, PE07).
(1) Parameters
The fully closed loop control error detection function is selected.
(2) Fully closed loop control error detection function
1) Motor side feedback speed (r/min)
2) Motor side feedback position (pulse)
(Load side equivalent value)
3) Load side end feedback speed (r/min)
4) Load side end feedbacl position (pulse)
(a) Speed difference error detection
Set " 1" in parameter No.PE03 to make the speed deviation error detection valid.
Comparing the motor side feedback speed (1)) and load side feedback speed (3)), if the difference is
not less than the set value (1 to the permissible speed r/min) of parameter No.PE06 (fully closed loop
control speed deviation error detection level), the function generates an alarm (fully closed loop control
error detection (42)) and stops. The initial value of parameter No.PE06 is 400r/min. Change the set
value as required.
Parameter No.PE03
0 0 0
Fully closed loop control error detection function selection
0: Invalid
1: Speed difference error detection
2: Position difference error detection
3: Speed difference error/position deviation error detection
Parameter No.PE03
Servo motor
1
Speed difference error detection
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Linear encoder