Mitsubishi Electric Q12DCCPU-V - Page 224

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6.2 Fail-Safe Circuit
6
PREPARATORY PROCEDURES AND SETTING
(1) Circuit example for system design (when not using the ERR. contact of
the power supply module)
Figure 6.3 Circuit example for system design (when not using the ERR. contact of the power supply module)
The power-up procedure is as follows:
For AC
[1] Turn on the power.
[2] Set the C Controller module to "RUN".
[3] Turn on the start switch.
[4] When the magnetic contactor (MC) turns on, the output
equipment is driven by the user program.
*1
For AC/DC
[1] Turn on the power.
[2] Set the C Controller module to "RUN".
[3] When DC power is applied, RA2 is turned on.
[4] When RA2 turns on, XM is turned on.
Upon 100% establishment of the DC input signal, processing is
started by the user program.
*2
[5] Turn on the start switch.
[6] When the magnetic contact (MC) turns on, the output
equipment is driven by the user program.
C Controller module
User
program
*1
MC
RA1
RA2
XM
Ym
Yn
MC2
MC1
MC MC
MC
MC2
MC1
Ym
Yn
MC
RA1
MC
MC
RA2
L
MC1
RA1
MC2
MC1
MC2
L
RA1
MC
(-)
(+)
FOR AC FOR AC/DC
Power
supply
Power
supply
Transformer
Fuse
START
SW
STOP
SW
Input module
Output module
Output module
Low battery alarm
(Lamp or buzzer)
Turns ON at start of
C Controller module
user program.
Power to output
equipment is turned
off when the STOP
signal is given.
Started when RA1
(control start output of
C Controller module)
turns ON.
RUN/STOP circuit
In the case of an
emergency stop or a
stop caused by a
limit switch.
Interlock circuits
Trans-
former
Trans-
former
Fuse Fuse
Fuse
DC
power
Voltage relay is
recommended
Low battery alarm
(Lamp or buzzer)
Turns ON at start of
C Controller module
user program.
Power to output
equipment is turned
off when the STOP
signal is given.
In the case of an
emergency stop or a
stop caused by a
limit switch.
START
SW
STOP
SW
Output module
Output module
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 .
User
program
*2
C Controller module