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1-42
Section 1 Specifications
1-5 Variables
1-5-1 Overview of variables
MICREX-SX series is a PLC that conforms to IEC61131 (programming language standards of programmable controllers). Its
application program realizes control through “program code worksheet” in which the logic operation of a program is described
and “variables worksheet” in which the allocation of hardware and memories to use is described. Because hardware and control
logic can be separated by coding a program with variables, it is possible to make highly reusable application programs.
Control system
Y6
Y1
AC100~240V
C0
Y0
Y4
Y2
C2
Y3
PORT0
Y5
C4
C6
0
4
8
2
I
6
5
9
Y8
Y7
Y9
3
7
X8
X0
24V OUT
S/S
RX
TX
I2 I3
X4
X2
X1
X3
0
8
4
2
I
I0
9
6
5
X6
X5
X7
X12
3
II
7
X10
X9
X11
X13
SINK
SRCE
max.
400mA
IN
PWR/
BAT
RUN/
MEM
ALM
IN (X)
OUT (Y)
Application program
Code worksheet (control logic)
Variables worksheet
CPU memory is allocated by variables worksheet.
Easily applicable to other
control systems