RSView Supervisory Edition Installation Guide
RSView Supervisory Edition Installation Guide
RSView Supervisory Edition Installation Guide
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Using the arrow keys at run time .......................................................................... 19-35<br />
Printing the trend chart at run time ...................................................................... 19-36<br />
Using overlays at run time...................................................................................... 19-36<br />
Fixing run-time errors............................................................................................. 19-37<br />
Chapter 20<br />
Creating expressions ...........................................................................................................20-1<br />
About expressions.......................................................................................... 20-1<br />
Where you can use expressions............................................................................... 20-1<br />
Using expressions in a command............................................................................ 20-2<br />
Expression components ........................................................................................... 20-2<br />
Creating expressions.................................................................................... 20-3<br />
Expression buttons.................................................................................................... 20-4<br />
Using the Check Syntax button............................................................................... 20-4<br />
Cutting, copying, and pasting expressions............................................................. 20-4<br />
Formatting expressions............................................................................................. 20-5<br />
Using tag names and tag placeholders in expressions....... 20-5<br />
Using area names with tag names ........................................................................... 20-6<br />
Using tag placeholders instead of tag names......................................................... 20-6<br />
Using constants in expressions............................................................ 20-6<br />
Using operators in expressions ............................................................ 20-7<br />
Arithmetic operators ................................................................................................. 20-7<br />
Relational operators................................................................................................... 20-8<br />
Logical operators ....................................................................................................... 20-9<br />
Bitwise operators ....................................................................................................... 20-9<br />
Evaluation order of operators ............................................................................... 20-11<br />
Using built-in functions in expressions ......................................... 20-13<br />
Tag functions............................................................................................................ 20-14<br />
Time functions ......................................................................................................... 20-17<br />
File functions............................................................................................................ 20-20<br />
xxiv <strong>RSView</strong> <strong>Supervisory</strong> <strong>Edition</strong> User’s <strong>Guide</strong>