Vector VEC-VA Series, Programming Manual

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VA Motion Controller Programming Manual
235
When the contact C 206 is O N time , the
instruction is executed, when the
address V4 35 of the string address length
less than or equal V4 36 the string length
of time; address
V4 37 [
output
1
; No's
output 0
Execution of results
;
V4 35 < = V4 36 Output 1
10.4.19 LT_STRING (string is less than)
IL programming language LD, FBD programming language
Function: The
LT_STRING
instruction is used to determine if the first string is smaller than
the second string.
LD IN1
LT_STRING IN2
ST OUT
ST
programming language
OUT:=LT_STRING
(
IN1
,
IN2
)
Note : IL, ST language programming needs to insert variables IN1, IN2 and OUT or use
constants in the current POU variable worksheet

LT_STRING instruction processing data types
Input
and output
type of
data
description
IN1 STRING First input
IN2 STRING Second input
OUT BOOL Output, if the first character of the first input string is less
than the first character of the second input string, then IN1<IN2,
OUT=1;
otherwise
OUT=0;
the size of the character is in
accordance with its ASCII code Calculation

Funtion and Action examples
Comparison V4 38 is the V439 two
character strings
description