Mitsubishi Electric Q26UD(E)HCPU User Manual page 674

(2) System design circuit example (when using ERR. terminal of power supply
module)
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 power-on procedure is as follows:
For AC/DC
1) Power on the programmable controller.
2) Set CPU 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 must be the period of time from when RA2
goes ON to the establishment of 100% DC voltage. Set this value to approximately 0.5s.)
5) Turn on the start switch.
6) When the magnetic 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.)
672
Power supply
FOR AC/DC
Transformer
Fuse
CPU module
SM52
SM403
XM
TM
NO
MC1 NO M10
M10
Program
START SW
RA1 RA3
MC STOP SW
RA2
Output module
Ym
Yn
ERR
Power supply module
Output module
MC2
Transformer
Fuse
DC power
Ym
(-) (+)
Yn
Fuse
Set time for DC power
TM
supply to be established.
MC
RA2
Voltage relay is
recommended
XM
Low battery alarm
L
(Lamp or buzzer)
RA1
OFF at ERR contact OFF
(stop error occurrence)
RA3
MC MC
Power OFF of output equipment
at stop
At an emergency stop
At a stop caused by a limit switch
At ERR contact OFF
MC1
MC1
MC2