Cicode Programming Reference > Using Variables > Declaring the Variable Data Type

Declaring the Variable Data Type

You can use variables of the following data types:

INT

Integer (32 bits)

-2,147,483,648 to 2,147,483,647

REAL

Floating point (64 bits)

-1.7E308 to 1.7E+308

with 15 digits of precision

STRING

Text string (128 bytes maximum, including null termination character)

ASCII (null terminated)

OBJECT

ActiveX control object reference (32 bits)

  

QUALITY

Represents the Citect SCADA quality (64 bits)

QUAL_GOOD, QUAL_BAD, QUAL_UNCR

TIMESTAMP

Represents the number of 100-nanosecond intervals since January 1, 1601 (64 bits)

  

If you want to specify a digital data type, use the integer type. Digital types can either be TRUE(1) or FALSE(0), as can integer types.

Note: Cicode may internally store floating point values as 64 bit to minimize rounding errors during floating point calculations.
When comparing REAL values in Cicode it is recommended you use the Round() function before doing the comparison.

ClosedQUALITY Data Type

The QUALITY data type is a new data type in Cicode which incorporates the Citect SCADA quality. The QUALITY data type and the Cicode quality labels can be used in Cicode expressions.

The operators allowed for the QUALITY data type are:

The assignment operation also allows for the QUALITY data type.

Example: 

QUALITY q1;
QUALITY q2;
 
q1 = q2;
q1 = Tag1.Field.Q;
 
//the following expression will generate a compiler error as a tag //element can be modified only as a whole
Tag1.Field.Q = q1;

A set of Cicode functions are provided which allow quality fields to be initialized, a specific quality field to be extracted, and other operations on the QUALITY data type. Conversion between the QUALITY data type and other Cicode data types is not allowed. Direct conversion from Quality to string will return an empty string.

Example:

//this will generate a compiler error
INT n = Tag1.Q;
ClosedTIMESTAMP Data Type

The TIMESTAMP data type represents the date and time as a 64-bit value by specifying the number of 100-nanosecond intervals since January 1, 1601.This data type is always in Coordinated Universal Time (UTC).

The operators allowed for the TIMESTAMP data type are:

Example:

 
TIMESTAMP t1;
TIMESTAMP t2;
 
t1 = Tag1.T;
t1 = t2;
 
IF	t1 < Tag2.T THEN
// insert code here
END

A set of Cicode functions are provided which allow initialization, conversion and other operations on the TIMESTAMP data type. Implicit conversion between the TIMESTAMP data type and other Cicode data types is not allowed.

See Also

Using Variables

Published June 2018