Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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7 CONTROL SUB FUNCTIONS
7.4 Function to Limit Control
Wiring the hardware stroke limit
When the hardware stroke limit function is used, wire the terminal of the FLS (Upper limit signal) and RLS (Lower limit signal)
of the RD75 as shown in the following figure. (when the initial value is set in [Pr.22] Input signal logic selection)
• When wiring the terminals, set the limit switch installed in the direction in which the current feed value
increases as the upper limit, and the switch installed in the direction in which the current feed value
decreases as the lower limit. If the upper and lower limit switches are wired in incorrect directions, the
hardware stroke limit function does not operate properly, and the motor does not stop.
• Adjust the value in [Pr.6] Rotation direction setting so that the increasing or decreasing direction of the
current feed value matches with the movement direction of the workpiece. (  Page 385 [Pr.6] Rotation
direction setting)
Control precautions
• If the machine is stopped outside the RD75 control range (outside the upper/lower limit switches), or is stopped due to the
detection of the hardware stroke limit, the OPR control (excluding when the OPR retry function is valid), Major positioning
control, and Advanced positioning control cannot be started. To perform these types of the control again, return the
workpiece into the RD75 control range using the JOG operation, Inching operation, or Manual pulse generator operation.
• When [Pr.22] Input signal logic selection is set to the initial value, the RD75 cannot perform the positioning control if FLS
(Upper limit signal) is separated from COM or RLS (Lower limit signal) is separated from COM (including when not wired).
When the hardware stroke limit function is not used
When the hardware stroke limit function is not used, wire the terminals of the FLS (Upper limit signal) and RLS (Lower limit
signal) of the RD75 as shown in the following figure.
When Positive logic is set as the logic for FLS and RLS in [Pr.22] Input signal logic selection, the positioning control can be
performed even if FLS and RLS are not wired. For details, refer to the following.
 Page 308 External I/O Signal Logic Switching Function
FLS
RLS
COM
RD75
24VDC
RD75
FLS
RLS
COM
24VDC