Siemens S7-1200 - S_MOVE (Move Character String) Instruction; String Conversion Instructions; S_CONV, STRG_VAL, and VAL_STRG (Convert To;From Character String and Number) Instructions

Extended instructions
8.2 String and character
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
293
Valid String data
A valid string has a maximum length that must be greater than zero but less than 255. The
current length must be less than or equal to the maximum length.
Strings cannot be assigned to I or Q memory areas.
For more information see: Format of the String data type (Page 114).
8.2.2
S_MOVE (Move character string) instruction
Table 8- 16 String move instruction
LAD / FBD
SCL
Description
out := in;
Copy the source IN string to the OUT location. S_MOVE execution does not affect
the contents of the source string.
Table 8- 17 Data types for the parameters
Parameter
Data type
Description
IN
String
Source string
OUT
String
Target address
If the actual length of the string at the input IN exceeds the maximum length of a string
stored at output OUT, then the part of the IN string which can fit in the OUT string is copied.
8.2.3
String conversion instructions
8.2.3.1
S_CONV, STRG_VAL, and VAL_STRG (Convert to/from character string and number)
instructions
You can convert number character strings to number values or number values to number
character strings with these instructions:
● S_CONV converts (number string to a number value) or (number value to a number
string)
● STRG_VAL converts a number string to a number value with format options
● VAL_STRG converts a number value to a number string with format options