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CHAPTER 2
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 Instruction
Contact instruction
Association instruction
Output instruction
Sequence
Shift instruction
instruction
Master control instruction
Termination instruction
Other instruction
Comparison operation
instruction
Arithmetic operation
instruction
BCD
BIN conversion
instruction
Basic
Data transfer instruction
instruction
Program branch instruction
Program run control
instruction
I/O refresh
Other convenient instruction
Logical operation instruction
Rotation instruction
Shift instruction
Bit processing instruction
Data processing instruction
Structure creation instruction Repeated operation, subroutine program calls, indexing in ladder units
Table operation instruction
Buffer memory access
instruction
Application
Display instruction
instruction
Debugging and failure
diagnosis instruction
Character string processing
instruction
Special function instruction
Data control instruction
Switching instruction
INSTRUCTION TABLES
Operation start, series connection, parallel connection
Ladder block connection, store/read operation results, creation of pulses from
operation results
Bit device output, pulse output, output reversal
Bit device shift
Master control
Program termination
Program stop, instructions such as no operation which do not fit in the above
categories
Comparisons such as
,
,
Addition, subtraction, multiplication or division of BIN or BCD
Conversion from BCD to BIN and from BIN to BCD
Transmits designated data
Program jumps
Enables or inhibits interrupt programs
Executes partial refresh
Instructions for: Counter increment/decrement, teaching timer, special
function timer, rotary table shortest direction control, etc.
Logical operations such as logical sum, logical product, etc.
Rotation of designated data
Shift of designated data
Bit set and reset, bit test, batch reset of bit devices
16-bit data searches, data processing such as decoding and encoding
Data table read/write
Data read/write from/to an intelligent function module
Print ASCII code, LED character display, etc.
Check, status latch, sampling trace
Conversion between BIN/BCD and ASCII;conversion between BIN and
character string; conversion between floating decimal point data and
character strings, character string processing, etc.
Trigonometric functions, conversion between angles and radians, exponential
operations, automatic logarithms, square roots
Upper and lower limit controls, dead band controls, zone controls
File register block No. switches, designation of file registers and comment files
Meaning
2
3
Reference
Chapter
4
5
Page 124,
CHAPTER 5
6
7
8
Page 172,
CHAPTER 6
Page 305,
CHAPTER 7
25
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