Technical Reference > CitectSCADA Reference Information > Specifications > I/O device data types

I/O Device data types

The table below displays the data types, size, and allowed values.

Data Type

Size

Allowed Values

BCD

2 bytes

0 to 9,999

Byte

1 byte

0 to 255

Digital

1 bit or 1 byte

0 or 1

Integer

2 bytes

-32,768 to 32,767

Unsiged Integer

Long Integer

4 bytes

Long BCG

4 bytes

Floating Point (Real)

4 bytes

String

256 bytes (Tags and Cicode Functions)

ASCII (null terminated)

128 bytes (Global Cicode Variables)