
8. LOADING AND INSTALLATION
8 - 2
MELSEC-A
(1)
System design circuit example
POWER
TRANSFORMER
FUSE
CPU
M9006
Ym
Yn
Y1
M9084
M9039
PROGRAM
START SW
RA1
MC
STOP SW
INPUT MODULE
XM
RA2
OUTPUT MODULE
Ym
Yn
RA1
L
MC
MC
OUTPUT MODULE
MC1
MC2
RA2
MC2
MC1
MC
Y1
*1
*2
*3
*4
*4
POWER
TRANSFORMER
TRANSFORMER
FUSE
FUSE
DC
POWER
SUPPLY
(-)
(+)
FUSE
FUSE
FUSE
FUSE
CPU
M9006
M9039
XM
TM
TM
M10
MC1
M10
N0
RA1
STOP SW
START
MC
INPUT MODULE
MC
M9084
TM
Yn
Ym
XM
RA2
OUTPUT MODULE
L
RA1
Ym
Yn
MC1
MC2
MC2
MC1
OUTPUT MODULE
RA2
*6
*1
*5
*2
*7
*4
MC
MC
Voltage relay is
recommended
*8
FUSE
XM
*8
N0
PROGRAM
ALL AC
Mixed AC and DC
*1 : RUN/STOP circuit
interlocked with RA1 (run
monitor relay)
*2 : Low battery alarm
*3 : RA1 switched ON by
M9039 (run monitor relay)
*4 : Power to output
equipment switched OFF
when the STOP signal is
given.
*5 : Input switched when
power supply established.
*6 : Set time for DC power
supply to be established.
*7 : ON when run by M9039
*8 : Interlock circuits as
necessary.
The power-ON procedure is as follows :
For AC
1) Switch ON the power.
2) Set the CPU module to RUN.
3) Turn ON the start switch.
4) When the magnetic contactor (MC) comes in, the output
equipment is powered and may be driven by the program.
For AC/DC
1) Switch ON the power.
2) Set the CPU module to RUN.
3) Turn ON the start switch.
4) When DC power is established, RA2 comes ON.
5) Timer (TM) times out after the DC power reaches 100 %.
(The TM set value should be the period of time from when RA2
comes ON to the establishment of 100 % DC voltage. Set this
value to approximately 0.5 seconds.)
6) When the magnetic contactor (MC) comes in, 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.)
Содержание A1SH
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