Omron CJ - REFERENCE MANUAL 10-2009 Reference Manual page 1096

Table of Contents

3. Instructions

Operand Specifications

Word addresses

Note If the beginning position designated by S3 is beyond the text string designated by S1, an error will be generated and the

Error Flag will turn ON.

Within the text string identified by the first

word designated by S1 until the NUL code (00

characters designated by S2, from the

beginning word designated by S3, and

outputs the result to D as text string data (with

NUL added at the end).

If the number of characters to be read extends

beyond the end of the text string designated

by S1, the string will be output up to the end.

If 0 (0000 hex) is designated as the number of

characters to be read, the two NUL characters

(0000 hex) will be output to D.

MID$(654) can be processed in the background. Refer to the SYSMAC CS/CJ/NSJ Series PLC

Programming Manual (W394) or the CJ2 CPU Unit Software Operation Manual (W473) for details.

Sample program

In this example, MID$(654) is used to read three characters.

• ON if more than 4,095 characters are designated by S1.

• ON if more than 4,095 characters (0FFF hex) are designated by S2.

• ON if the S3 data is not within the range of 1 to 4,095 (0001 to 0FFF hex).

• ON if S3 is greater than S1.

• ON if the Communications Port Enabled Flag for the communications port number specified as the

Com Port number for Background Execution is OFF when background processing is specified.

• OFF in all other cases.

• ON if 0000 (hex) is output to D.

• OFF in all other cases.

Text string ABCDEFGHIJ

Indirect DM/EM

Three characters read.

From 5th character

(leftmost byte in D00102).

CS/CJ/NSJ Series Instructions Reference Manual (W474)

Text string EFG

Chapters

Table of Contents