B&B Electronics VFG3000 - Manual - Manual (Page 200)

R UNNING P ROGRAMS V LINX F IELDBUS G ATEWAY M ANAGER U SER M ANUAL
P AGE 184
such that an example such as Data.1:=(Level>10) can be used to set or clear a bit
depending on whether or not a tank level exceeds a preset value.
R
UNNING
P
ROGRAMS
Programs may be invoked within actions by following the program name with a pair of
parentheses. For example,
Program1() will invoke the associated program. The program will
execute in the foreground or background as defined by the program’s properties.
U
SING
F
UNCTIONS
Fieldbus Gateway Manager provides a number of predefined functions that can be used to
perform various operations. These functions are defined in detail in the Function Reference.
They are invoked using a syntax similar to that for programs, with any arguments to the
function being enclosed within the parentheses. For example,
SetLanguage(1) will set the
terminal language to 1.
O
PERATOR
P
RIORITY
All assignment operators fall into Group 14. In other words, they will be evaluated after all
other operators in an action. They are also unique in that they group right-to-left. This means
that code such as
Tag1:=Tag2:=Tag3:=0 can be used to clear all three tags at once.