Mitsubishi Electric MELSEC-Q Series User Manual page 643

[2] Wiring the hardware stroke limit
(Note): Wire the limit switch installed in the direction to which "Feed current value" increases as upper
limit switch and the limit switch installed in the limit switch installed in the direction to which
"Feed current value" decreases as lower limit switch. If inverting the install positions of
upper/lower limit switches, hardware stroke limit function cannot be operated properly. In
addition, the servomotor does not stop.
The increase/decrease of the feed current value and the motor rotation direction/travel
direction can be changed by the parameters depending on the servo amplifier. Refer to the
servo amplifier instruction manual for details.
[3] Precautions during control
Refer to the instruction manual of the servo amplifier to be used for details on
input and wiring of the signal.
When using MR-J4-GF, execute the parameter setting and wiring related to the
LSP/LSN signal. (Refer to "[1] Control details".)
When using the hardware stroke limit function, wire the terminals of the servo
amplifier upper/lower limit stroke limit as shown in the following drawing. As for
the 24VDC power supply, the direction of current can be switched.
(When "[Pr.22] Input signal logic selection" is set to the initial value)
When using the hardware stroke limit function with the external input signal via
CPU (buffer memory of QD77GF), wiring differs depending on the input module.
Servo amplifier
DICOM
Fig. 13.18 Wiring when using the hardware stroke limit
(1) If the machine is stopped outside the Simple Motion module control range
(outside the upper/lower limit switches), or if stopped by hardware stroke
limit detection, the starting for the "HPR control", "major positioning control",
and "high-level positioning control" and the control mode switching cannot
be executed. To carry out these types of control again, return the workpiece
to the Simple Motion module control range by a "JOG operation", "inching
operation" or "manual pulse generator operation".
(2) When "[Pr.22] Input signal logic selection" is set to the initial value, the
Simple Motion module cannot carry out the positioning control if FLS (limit
switch for upper limit) is separated from DICOM or RLS (limit switch for
lower limit) is separated from DICOM (including when wiring is not carried
out).
DI1
(LSP)
DI2
(LSN)
24VDC
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Chapter 13 Control Sub Functions