Mitsubishi Electronics QD75D, QD75P [2] Wiring the hardware stroke limit, [4] When the hardware stroke limit function is not used

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MELSEC-Q
12 CONTROL SUB FUNCTIONS
[2] Wiring the hardware stroke limit
When using the hardware stroke limit funct ion, wire the terminals of the QD75
upper/lower limit stroke limit as shown in th e following drawing.
(When " Pr.22 Input signal logic selection" is set t o the initial value)
QD75
FLS
RLS
COM
24VDC
Note) Connect the u pper and lower limit switches to the direct ions of increasing and decreasing
current feed values respectively. When thes e switches are connected in wrong directions, the
hardware stroke limit function does not operate pr operly and the motor does not stop.
For " Pr.6 Rotation direction setting", refer to "5.2.1 Basic parameters 1" .
Fig. 12.20 Wiring when using the hardware strok e limit
[3] Precautions during control
(1) If the machine is stopped outside the QD75 con trol range (outside the
upper/lower limit switches), or if stopped b y hardware stroke limit detection,
the "OPR control", "major positioning con trol", and "high-level positioning
control" cannot start. To carry out these types of co ntrol again, return the
workpiece to the QD75 control range by a "JO G operation", "inching
operation" or "manual pulse generator operation".
(2) When " Pr.22 Input signal logic selection" is set to t he initial value, the
QD75 cannot carry out the positioning contro l if FLS (upper limit signal) is
separated from COM or RLS (lower limit signal) is separated from COM
(including when wiring is not carried out).
[4] When the hardware stroke limit function is not used
When not using the hardware stroke limit function , wire the terminals of the QD75
upper/lower limit stroke limit as shown in th e following drawing.
When the logic of FLS and RLS is set to "posit ive logic" using " Pr.22 Input
signal logic selection", positioning control can be carried out eve n if FLS an d RL S
are not wired.
(For details, refer to Section 13.4 "Extern al I/O signal logic switching function".)
QD75
FLS
RLS
COM
24VDC
Fig. 12.21 Wiring when not using the hardware str oke limit function
(When " Pr.22 Input signal logic selection" is the initial value)