672
(2) System design circuit example (when using ERR. terminal of power supply
module)
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.)
Power supply
FOR AC/DC
Transformer
Transformer
CPU module
Input switched
when power supply
established.
RUN/STOP circuit
interlocked with RA1
(run monitor relay)
Fuse
FuseFuse
MC
RA1
RA2
XM
Ym
MC2
MC1
M10
NO
MC MC
SM52
XM
TM
ERR
SM403
RA3
Yn
Power supply module
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.
START SW
STOP SW
Program
Output module
Output module
DC power
Set time for DC power
supply to be established.
Voltage relay is
recommended
Low battery alarm
(Lamp or buzzer)
OFF at ERR contact OFF
(stop error occurrence)
At an emergency stop
At a stop caused by a limit switch
At ERR contact OFF
MC
RA2
L
MC1
RA3
MC2
Ym
TM
MC1 NO M10
(-) (+)
Yn
RA1
Power OFF of output equipment
at stop
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