Tag is a logical name given to I/O or Memory variable.for example if you have to select any object in the SCADA you have to give him a tag name.
**Types of Tag**
Analog tag:-
Memory
· Real(ex: -10.1,2.2,3.3).
· Integer(ex: -10,2,3).
Input/Output
· Real.
· Integer.
Digital tag:-
Memory
· Discrete.
INPUT/OUTPUT
· Discrete.
System Tag:-
System
Access Level