Lenze DDS v2.3 - Manual (Page 263)

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IEC 61131-3 Data types
10-7
l
DDS EN 2.3
10.2.5 References
The user-defined data type “ Reference” generates an alternative name for a variable, constant or
function block.
Organize your references as objects in the Object Organizer on the index card Data types. They
start with the keyword TYPE and end with END_TYPE.
Syntax:
TYPE <Identifier>: <Assignment expression>;
END_TYPE
Example:
TYPE message:STRING[20];
END_TYPE ;
10.2.6 Subrange types
The value range of a subrange type merely comprises a basic type subset. Declaration may be on
the Data types index card. A variable can also be declared directly with a subrange type.
Syntax for declaration on the Data types index card
TYPE<Name>:<Inttype>(<ll>..<ul>):=Initial value;END_TYPE
<NAME> Must be a valid IEC identifier.
<Inttype> One of the data types SINT, USINT, INT, UINT, DINT, UDINT, BYTE, WORD, DWORD
<ll> Is a constant that must be compatible with the basic type and defines the range type lower limit. The lower limit pertains to
this range.
<ul> Is a constant that must be compatible with the basic type and defines the range type upper limit. The upper limit pertains to
this basic type.
TYPE
SubInt : INT (-4095..4095);
END_TYPE
•
Direct declaration of a variable with a subrange type.
•
Correct specification of an initial value if the subrange does not include 0.
VAR
i1 : INT (-4095..4095);
i2: INT (5..10):=5;
ui : UINT (0..10000);
END_VAR
Error message
The assigned constant of a subrange type (declaration or implementation) must be within the value
range as otherwise an error message will be output.
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