Mitsubishi Electric MELSEC-Q Series - Page 642

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Chapter 13 Control Sub Functions
[1] Control details
The following drawing shows the operation of the hardware stroke limit function.
(1) External input signal of servo amplifier
For the operation when the servo amplifier stroke limit is detected, confirm the specifications of the
servo amplifier to be used. The following shows the case of MR-J4-GF use.
Mechanical stoppe
r
Lower limi
t
Simple Motion module control moveable range
Upper limi
t
Mechanical stopper
Movement
direction
Start
Deceleration stop at
lower limit switch detection
*4
Lower limit switch
*2
Upper limit switch
*2
Deceleration stop at
upper limit switch detection
*4
Start
Movement
direction
Servo amplifier
*1
CC-Link IE
Field Network
Simple Motion
module
*3
1: Set the following servo parameters properly. (Refer to "[5] Servo parameter setting" for details.)

Set "0: Input from servo amplifier" to "Sensor input type selection" of the servo parameter "Function
selection D-4 (PD41)".

Set "1: Enabled only for home position return mode" to "Stroke limit enabling condition selection" of the
servo parameter "Function selection D-4 (PD41)".

Assign the LSP/LSN signal with the servo parameter "Input device selection 1 to 3 (PD03 to 05)".
2: The signal to be wired differs by the servo parameter "Rotation direction selection/travel direction selection
(PA14)".
Setting value of "Rotation direction selection/travel direction selection
(PA14)"
Signal name of servo amplifier
Lower limit Upper limit
0: Forward rotation (CCW) with the increase of the positioning address LSN LSP
1: Reverse rotation (CW) with the increase of the positioning address LSP
LSN
3: Set the same value in "[Pr.22] Input signal logic selection" as the value set in the input logic setting of the
servo amplifier. For the input logic specification of the servo amplifier, refer to the instruction manual of the
servo amplifier to be used.
4: The Simple Motion module executes the stop process.
(2) External input signal via CPU (buffer memory of QD77GF)
Simple Motion module control moveable range
Movement
direction
Start
Deceleration stop at
lower limit switch detection
Lower limit switch Upper limit switch
Deceleration stop at
upper limit switch detection
Start
Movement
direction
Lower limi
t
Upper limi
t
Mechanical stopperMechanical stoppe
r
Simple Motion module
Input module
Set the servo parameter properly. (Refer to "[5] Servo parameter setting" for details.)
Fig. 13.17 Hardware stroke limit function operation