Mitsubishi Electric MELSEC iQ-R Series User Manual page 251

Wiring the hardware stroke limit
When using the hardware stroke limit function, wire the signal terminals corresponding to the upper/lower stroke limit of the
device to be used as shown in the following drawing.
■External input signal of the servo amplifier
Refer to the manual of the servo amplifier to be used for details on signal input availability and wiring.
Check the specifications of the servo amplifier to be connected before performing wiring and setting.
■External input signal via CPU (buffer memory of the Motion module)
For the wiring, refer to the manual of the module into which the external input signal is to be input.
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 servo motor does not stop.
The increase/decrease of "Feed current value" and the motor rotation direction/movement direction can be
changed by the parameters depending on the servo amplifier. Refer to the servo amplifier instruction manual
for details.
When the hardware stroke limit function is not used
When not using the hardware stroke limit function, set the logic of FLS and RLS to the "negative logic" (initial value) with
"[Pr.22] Input signal logic selection" and input the signal which always turns ON. Otherwise, set the logic of FLS and RLS to
the "positive logic" with "[Pr.22] Input signal logic selection" and always turn OFF the input.
Precautions during control
• If the machine is stopped outside the Motion module control range (outside the upper/lower limit switches), or if stopped by
hardware stroke limit detection, the starting for the "home position return 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 Motion module control range by a "JOG operation", "inching operation" or "manual pulse
generator operation".
• When "[Pr.22] Input signal logic selection" is set to the initial value, the 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).
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8 CONTROL SUB FUNCTIONS
8.3 Functions to Limit the Control
8
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