Siemens SINUMERIK, Commissioning Manual

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Programming
2.7 Functions
Expanding the user interface
Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0
2-105
2.7.29 External functions (only HMI Advanced)
Description
Additional user-specific functions can be used by means of this call. External functions are
stored in a DLL file and identified by an entry in the definition lines of the configuration file.
Note
An external function must have at least one return parameter.
Programming
Syntax: FCT
Function name = ("File"/Type of return/Types of permanent call
parameters/Types of variable call parameters)
Description: Declares additional, external functions
Parameters: Function name Name of external function
File Complete path to DLL file
Type of return Data type of return value for function
R, I, S, C, B. Data types of permanent call parameters and
return values. The data types are separated by
commas.
Variable or register Data types of variable call parameters
Syntax: FCT
Function name (call parameter)
Call parameter List of all call parameters. Individual parameters
are separated by commas.
Example
//M(SCREEN FORM1)
DEF VAR1 = (R)
DEF VAR2 = (I)
DEF RET = (I)
FCT InitConnection = ("c:\user\mydll.dll"/I/R,I,S/I,S)
; The external function "InitConnection" is declared. The
data type of what has been declared. The data type of
the return value is Integer, the data types of the
permanent call parameters are Real, Integer and String;
the data types of the variable call parameters are
Integer and String.
LOAD
RET = InitConnection(VAR1+SIN(VAR3),13,"Servus",VAR2,