Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 21)

xxi
C ONTENTS
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Setting up keys to run FactoryTalk View commands ...............................................19– 6
General rules governing precedence..................................................................19– 7
Precedence and the
F1
key................................................................................19– 7
Precedence and embedded ActiveX objects ......................................................19– 7
Precedence and embedded
OLE
objects ..........................................................19– 8
Keyboard shortcuts ............................................................................................19– 8
About navigation buttons ........................................................................................19– 10
How navigation buttons work..........................................................................19– 11
Creating a navigation button............................................................................19– 11
Viewing and clearing the navigation history ...................................................19– 13
20• Creating expressions..................................................................... 20–1
About expressions .....................................................................................................20– 1
Where you can use expressions in FactoryTalk View SE .................................20– 1
Working in the Expression editor .............................................................................20– 2
Expression components .....................................................................................20– 3
Checking the syntax of an expression ...............................................................20– 4
Cutting, copying, and pasting expressions ........................................................20– 4
Formatting expressions......................................................................................20– 4
Using tag names and tag placeholders in expressions ..............................................20– 5
Specifying the area with a tag name ..................................................................20– 5
Using tag placeholders to specify tag values.....................................................20– 5
Using constants in expressions..................................................................................20– 5
Using operators to modify values in expressions......................................................20– 6
Arithmetic operators ..........................................................................................20– 6
Relational operators ...........................................................................................20– 7
Logical operators ...............................................................................................20– 7
Bitwise operators ...............................................................................................20– 8
Evaluation order of operators ............................................................................20– 9
Using built-in functions in expressions...................................................................20– 11
Math functions .................................................................................................20– 11
File functions ...................................................................................................20– 12
Time functions .................................................................................................20– 13
Tag functions ...................................................................................................20– 15
Security functions ............................................................................................20– 17
Language function ...........................................................................................20– 18
FactoryTalk alarm functions............................................................................20– 18
Using if-then-else logic in expressions ...................................................................20– 19
Nested if-then-else..........................................................................................20– 20