Automatic control function programming manual ladder language

Organisation of the %Y Variables Available in the %SP Modules Called:
%Y0.L Contains the first argument if any; else don’t care.
%Y4.L Contains the second argument if any; else don’t care.
%Y14.L Contains the last argument if any; else don’t care.
%Y18.B Rest of the local variables.
%Y7F.B Last local variable.
Code Returned
If OK
Value returned by the %SP module called using function return().
Not significant if the called module does not return a value.
Example of Use of spy(..) and return(..)
Exchange of arguments during a call to an %SP module
Calling module (%TS, %TF or %SP):
%M100.W = spy(33, 10, %M20.B + %M30.B); Creation of 128 %Y local variables in the stack.
Arguments 10 and (%M20.B + %M30.B) are extended to 32 bits
and stored in the stack. The call to %SP33 is the made.
Module called %SP33 %Y0.L contains 10
%Y4.L contains the result of the expression (%M20.B + %M30.B).
return(%Y10.W + 25) Return to the calling module. The local variables are deleted
and the result of the expression (%Y10.W + 25) is loaded in
%M100.W.
6.27 Format a Character String sprintf
Syntax
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sprintf(&dest, &format {,&argn}5)
&dest: Destination string address.
&format: Format string address.
&argn: Possible argument.
Formats the string at address &format and copies it at address &dest. A ZERO byte is added at the end of &dest.
Function sprintf() supports the ANSI standard C language conversion specifications.
Operation
Function sprintf() is equivalent to printf() except that the formatted string is copied starting at address &dest instead
of being displayed.
For specification of the conversion formats, see function printf().