58
4-1. Operating Principles of the Programmable Controller
4-1. Operating Principles of the
Programmable Controller
1. Basic Configuration
A programmable controller is composed of four basic sections:
1
CPU,
2
memory,
3
input interface, and
4
output interface. An inside look at these sections will help you understand their functions and operation of the
programmable controller.
NPST-GR Software
FP
Programmer
II
Personal computer
Programming tools
Output field devices
Inverter
(variable speed
drive)
Segment
indicators
Indicators
Buzzers
Programmable Controller
Input field devices
Limit switches
Manual operating
switches
Photoelectric
sensors
Inductive
proximity switches
Encoders
Digital switches
Power supply
Relays
Solenoids
3
Input
inter-
face
4
Output
inter-
face
2
-a
Memory for operand
1
CPU
(Central
Processing Unit)
2
-b
System
register
2
-c
Memory for
program
Power supply
FP PROGRAMMER
ST
X•WX
AN
Y•WY
OR
R•WR
OT
L•WL
FN/P
FL
NOT
DT/Ld
STK
IX/IY
TM
T•SV
CT
C•EV
(BIN)
K/H
=
C
D
D
<
E
>
F
SHIFT
SC
8
9
A
B
4
5
6
7
0
1
2
3
(-)
OP
SRC
READ
(HELP)
CLR
ACLR
(DELT)
INST
ENT
WRT
Содержание FP1
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