xLadder user manual-V2.0.0.6

6.14.6 Look for the first character in the string

Input/output Operand

Data type

IN1, IN2

VB,constant string, LB, *VD, *LD, *AC

string

OUT

VB, IB, QB, MB, SB, SMB, LB, AC, *VD, *LD, *AC

byte

CHR - FIND : The instruction searches for the same character

as the string IN2 in the string IN1.Search starts from the

OUT start position.If a match character is found, the

character position is written to OUT.If a match character is

not found, the OUT is set to 0.

The longest length of a single constant string is 126

bytes.The longest comprehensive length of two constant strings is 240 bytes.

error conditions:

0006 Indirect address

0091 Operand range

009B Illegal index

ASCII constant string data type format :

String is a series of characters, each character is stored as a byte.The first byte of a

string defines the length of the string, that is the number of characters.If a constant

string is entered directly into the program editor or data block, the string must start

and end with double quotation marks ("string constant").

Example :

188

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