Mitsubishi Electric Q Series User Manual page 99

3 DESIGN
(2) System design circuit example of the PLC CPU area
Input switched when
power supply established
RUN/STOP circuit
interlocked with RA1
(run monitor relay)
Interlock circuits as necessary.
Provide external interlock
circuits for conflicting
operations, such as forward
rotation and reverse rotation,
and for parts that could
damage the machine or cause
accidents if no interlock were
used.
The start-up procedure is as follows
1) Switch the Motion controller power ON.
2) Set the Motion controller to RUN.
3) When DC power is established, RA2 goes ON.
4) Timer (TM) times out after the DC power reaches 100[%]. (The TM set value
should be the period of time from when RA2 goes ON to the establishment of
100[%] DC voltage. Set this value to approximately 0.5 seconds.)
5) Turn ON the start switch.
6) When the electromagnetic contactor (MC) comes on, the output equipment is
powered and may be driven by the program. (If a voltage relay is used at RA2,
no timer (TM) is required in the program.)
Power supply
Transformer Transformer
Fuse
PLC CPU area
SM52
Ym
SM403
Yn
XM
TM
TM
N0 MC1 N0 M10
M10
Program
START SW
RA1
MC
STOP SW
MC
RA2
Output module
Ym
Yn
RA1
Output module
MC2
MC1
MC1
MC2
3 - 6
Fuse
DC power
(-) ( )
+
Fuse
Set time for
DC power
supply to be
established
RA2
Voltage relay is
recommended
XM
Low battery alarm
(Lamp or buzzer)
L ON when run
by SM403
MC
MC
Power to output
equipment switched
OFF when the STOP
signal is given.
In the case of an
emergency stop or
a stop caused by
a limit switch.