5-1. Configuration of Basic Instructions
1. Types of Basic Instructions
Basic Sequence Instructions:
These basic instructions perform bit unit logic operations and are the basis of the relay sequence circuit.
Basic Function Instructions:
These are the timer, counter and shift register instructions.
Control Instructions:
These instructions determine the order and flow of program execution.
Compare Instructions:
These instructions compare data.
2. Configuration of Basic Instructions
• Since most of the basic instructions form the basis of the relay sequence circuit, they are expressed as relay coils
and contacts, as shown below.
Example:
Self-hold circuit by basic sequence instructions
• Relay types are given on the following page. Note that the relays that can be specified depend upon the instruction.
Refer to each instruction for details.
X0
R0
R0
Y0
R0
X1
External input contact
Internal coil
Address
External
output coil
Internal
contact
0
1
4
0
ST
X-WX
ST
X-WX
ST
X-WX
0
WRT
OR
R-WR
OR
R-WR
0
WRT
AN
Y-WY
NOT
DT/Ld
1
OT
L-WL
OR
R-WR
WRT
ST
X-WX
OR
R-WR
0
WRT
OT
L-WL
AN
Y-WY
0
WRT
WRT
Key operation of FP Programmer II
Screen of NPST-GR Software in Boolean ladder mode
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5-1. Configuration of Basic Instructions
Summary of Contents for FP1
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