Table of Contents
Advertisement
String instructions
CONCAT
CONCAT concatenates (attaches) the second and the following input strings (IN1 + IN2 + ...) to the
Description
first input string and writes the resulting string into the output variable.
To add an enable input and enable output to the instruction, select [With EN/ENO] from the
"Instructions" pane (LD, FBD or IL editor). To reuse an instruction select "Recently used" from the
context menu or press <Ctrl>+<Shift>+<v> in the programming window.
Availability of CONCAT (see page 1318)
PLC types
If the output string is longer than the length defined for the output
variable (output_string) in the field "Type", only as many characters
are copied, starting from the left, as the output variable can hold. The
special internal relay R9009 (%MX0.900.9) is set.
The number of steps may vary depending on the PLC and parameters
used, see also Table of Code Intensive Instructions in the online help.
Data types
Data type
STRING
STRING
STRING
Error flags
No.
IEC address
%MX0.900.7
R9007
%MX0.900.8
R9008
%MX0.900.9
R9009
In this example, the same POU header is used for all programming languages. For an example
Example
using IL (instruction list), please refer to the online help.
POU header
All input and output variables used for programming this function have been declared in the POU
header.
In this example the input variables (input_string1, input_string2 and input_string3) have been
declared. However, you may enter the strings ('Ideas', ' for' and ' life') directly into the function.
The strings have to be put in inverted commas, both in the POU header and in the function.
Body
Input_string3 (' life') is attached to input_string2 (' for') and this string is attached to
input_string1 ('Ideas'). The resulting string ('Ideas for life') is written into output_string.
270
Concatenate (attach) a string
I/O
Function
1st input
beginning input string
2nd input
string that will be attached to the beginning string
output
resulting string
Set
permanently
for an instant
for an instant
If
input string is longer than the length
defined for the input variable in the field
"Type"
output string is longer than the length
defined for the output variable in the field
"Type"
Advertisement
Table of Contents
