Rockwell-automation 57C610 Enhanced Basic Language, AutoMax Manual do Utilizador descarregar pdf (Página 31)

4Ć11

The following are invalid string constants and the reasons that they

are invalid:

WRONG TERMINATOR' (Surrounding quotes must be of same

type.)

`SAME HERE" (Surrounding quotes must be of same type.)

NO TERMINATOR (No closing double quote.)

The following are examples of valid string constants assigned to

string variables and string constants used as intermediate values in

expressions:

MESSAGE$ = GEAR BO

X F

AULT"

MESSAGE$ = SECTION 12 AIR PRESSURE SAFETY VALVE

FAULT"

PART_MES

SAGE$ = LEF

T$(SECTION 12 AIR PRESSURE

SAFETY VAL

VE F

AUL

T", 12)

(Valid string constant not assigned to a variable directly but used

an an intermediate value to a function.)

PRINT SECTION 12 AIR PRESSURE SAFETY VAL

VE F

AULT"

(Valid string constant used in a print statement.)

 

With integers and strings, a constant is used in initializing or

assigning a value to a variable. Boolean variables must be assigned

the values of true or false. The two boolean constants are TRUE" or

ON" and F

ALSE" or OFF

The following are valid boolean constants:

SYSTEM_READY@ = TRUE

OVER_TEMP@ = OFF

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Rockwell-automation 57C610 Enhanced Basic Language, AutoMax Manual do Utilizador Página 31