File Arithmetic And Logic (Fal); Relay Ladder; Structured Text - Allen-Bradley Logix5000 Reference Manual

File Arithmetic and Logic
(FAL)
Array (File)/Misc. Instructions (FAL, FSC, COP, CPS, FLL, AVE, SRT, STD, SIZE)
The FAL instruction performs copy, arithmetic, logic, and function operations
on data stored in an array.
Operands:

Relay Ladder

Operand
Control
Length
Position
Mode
Destination
Expression

Structured Text

Structured text does not have an FAL instruction, but you can achieve the same
results by using a SIZE instruction and a FOR...DO or other loop construct.
SIZE(destination,0,length-1);
FOR position = 0 TO length DO
destination[position] := numeric_expression;
END_FOR;
See Structured Text Programming
within structured text.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Type Format
CONTROL Tag
DINT Immediate
DINT Immediate
DINT Immediate
SINT Tag
INT
DINT
REAL
SINT Immediate
INT Tag
DINT
REAL
A SINT or INT tag converts to a DINT value by sign-extension.
for information on the syntax of constructs
Description
Control structure for the operation
Number of elements in the array to
be manipulated
Current element in array
Initial value is typically 0
How to distribute the operation
Select INC, ALL, or enter a number
Tag to store the result
An expression consisting of tags and/or
immediate values separated by operators
Chapter 8
349