Tag Data Types

Tags in CitectSCADA hold data values that can be defined as one of the following data types.

Data Type	Variable	Size	Allowed Values
BCD	Binary- Coded Decimal	2 bytes	0 to 9,999
BYTE	Byte	1 byte	0 to 255
DIGITAL	Digital	1 bit or 1 byte	0 or 1
INT	Integer	2 bytes	-32,768 to 32,767
UINT	Unsigned Integer	2 bytes	0 to 65,535
LONG	Long Integer	4 bytes	-2,147,483,648 to 2,147,483,647
ULONG	Unsigned Long Integer (Only for display on a screen.Arithmetic operations are not supported. )	4 bytes	0 to 4,294,967,295
LONGBCD	Long Binary- Coded Decimal	4 bytes	0 to 99,999,999
REAL	Floating Point	4 bytes	-3.4E38 to 3.4E38
STRING	String	256 bytes (maximum)	ASCII (null terminated)

Tag values can be used with the Cicode Variable data types.

A Cicode variable of INT data type can be used to store Tag data types: BCD, BYTE, DIGITAL, INT, UINT, LONG, ULONG and LONGBCD.

A Cicode variable of the QUALITY or TIMESTAMP data type can be used to store the Tag quality and timestamp items.