2 INSTRUCTION TABLES
2.1 Types of Instructions
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2 INSTRUCTION TABLES
2.1 Types of Instructions
The major types of CPU module instructions consist of sequence instructions, basic instructions, application instructions, data
link instructions, QCPU instructions and redundant system instructions. These types of instructions are listed in the following
Table.
Types of instructions Description Reference
Sequence
instruction
Contact instruction Operation start, series connection, parallel connection Page 131 SEQUENCE
INSTRUCTIONS
Association instruction Ladder block connection, store/read operation results, creation of pulses
from operation results
Output instruction Bit device output, pulse output, output reversal
Shift instruction Bit device shift
Master control instruction Master control
Termination instruction Program termination
Other instruction Program stop, instructions such as no operation which do not fit in the
above categories
Basic instruction Comparison operation
instructions
Comparisons such as =, >, < Page 187 BASIC
INSTRUCTIONS
Arithmetic operation instruction Addition, subtraction, multiplication or division of BIN or BCD
BCD BIN conversion
instruction
Conversion from BCD to BIN and from BIN to BCD
Data transfer instruction Transmits designated data
Program branch instruction Program jumps
Program run control instruction Enables or inhibits interrupt programs
I/O refresh instruction Executes partial refresh
Other convenient instruction Instructions for: Counter increment/decrement, teaching timer, special
function timer, rotary table shortest direction control, etc.
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