B&B Electronics VFG3000 - Manual - Manual (Page 205)

S YSTEM V ARIABLE R EFERENCE H OW ARE S YSTEM V ARIABLES U SED
R EVISION 1 P AGE 189
S
YSTEM
V
ARIABLE
R
EFERENCE
The following pages describe the various system variables that exist within Fieldbus Gateway
Manager. These system variables can be invoked within actions or expressions as described in
the previous two chapters.
H
OW ARE
S
YSTEM
V
ARIABLES
U
SED
System variables are used either to reflect the state of the system, or to modify the behavior of
the system in some way. The former type of variable will be read-only, while the latter type
can have a value assigned to it.