Programming 
  2.7 Functions 
Expanding the user interface 
Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0 
2-103 
REPLACE Function: Replacing characters 
 
Syntax:  REPLACE
( string, FindString, ReplaceString [, start [, count ] ] )
 
Description:  The REPLACE function replaces a character/string in a string with 
another character/string.  
Parameters:  string  String in which FindString is to be replaced with 
ReplaceString. 
  FindString  String to be replaced 
  ReplaceString  Replacement string (is used instead of the 
FindString) 
  start  Starting position for search and replace operations 
  count  Number of characters that are to be searched from 
the starting position after the FindString. 
Return Value:     
  string = Blank string  Copy of string 
  FindString = Blank string  Copy of string 
  ReplaceString = Blank 
string 
Copy of string, in which all occurrences 
of FindString are deleted 
  start > Len(String)  Blank string 
  count = 0  Copy of string 
 
2.7.28  PI services 
Description 
The PI_SERVICE function can be used to start PI Services (Program Invocation Services) 
from the PLC in the NC area. 
General programming 
 
Syntax:  PI_SERVICE (
service, n parameters
) 
Description:  Executes PI service 
Parameters:  Service  PI service identifier 
  n parameters  List of n parameters of PI Service.  
Individual parameters are separated by commas.