Basic Characteristics RAPID

Basic Characteristics RAPID Basic Elements
1 Basic Elements
1.1 Identifiers
Identifiers are used to name modules, routines, data and labels;
e.g. MODULE module_name
PROC routine_name()
VAR pos data_name;
label_name:
The first character in an identifier must be a letter. The other characters can be letters,
digits or underscores “_”.
The maximum length of any identifier is 16 characters, each of these characters being
significant. Identifiers that are the same except that they are typed in the upper case,
and vice versa, are considered the same.
Reserved words
The words listed below are reserved. They have a special meaning in the RAPID language
and thus must not be used as identifiers.
There are also a number of predefined names for data types, system data, instructions,
and functions, that must not be used as identifiers. See Chapters 7, 8, 9, 10 ,13, 14 and
15 in this manual.
AND BACKWARD CASE CONNECT
CONST DEFAULT DIV DO
ELSE ELSEIF ENDFOR ENDFUNC
ENDIF ENDMODULE ENDPROC ENDTEST
ENDTRAP ENDWHILE ERROR EXIT
FALSE FOR FROM FUNC
GOTO IF INOUT LOCAL
MOD MODULE NOSTEPIN NOT
NOVIEW OR PERS PROC
RAISE READONLY RETRY RETURN
STEP SYSMODULE TEST THEN
TO TRAP TRUE TRYNEXT
VAR VIEWONLY WHILE WITH
XOR
RAPID Reference Manual 5-3