Please enable JavaScript.
Coggle requires JavaScript to display documents.
Data Manipulation Instructions in PLCs - Coggle Diagram
Data Manipulation Instructions in PLCs
Overview of Data Manipulation
Purpose
Performs arithmetic, logic, and data transfer operations
Enhances process control and decision-making
Common Uses
Mathematical operations like addition and subtraction
Data transfers between registers or files
Registers and Memory Structures
Registers
Stores individual data elements
Example: N7:20 holds a single value
Tables/Files
Stores groups of related registers
Example: A table of sensor readings
Categories of Instructions
Arithmetic Instructions
Includes addition, subtraction, multiplication
Example: ADD, SUB, MUL
Logic Instructions
Performs logical operations like AND, OR
Example: EQU, NEQ, LES, GRT
Data Transfer Operations
MOV
Transfers data from one register to another
Example: Moving N7:20 to N7:35
MVM
Transfers data with a bitmask for selective copying
Example: Masking specific bits for transfer
FAL
Performs arithmetic/logic operations on entire files
Example: AND, OR operations on a file of data
Comparison and Test Instructions
Data Compare Instructions
Compares values to check for equality or inequality
Example: EQU (Equal), NEQ (Not Equal)
Limit Test (LIM)
Tests if a value is within a specified range
Example: Checking if temperature falls within range
Special Operations
Multibit I/O
Handles multiple bits at once (e.g., 16-bit or 32-bit data)
Example: Analog inputs or outputs
BCD Conversion
Converts decimal numbers to binary-coded decimal format
Example: Decimal 3286 to BCD
Bit Distribution
Distributes data bits to multiple registers or outputs