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Reference Manual
00809-0100-4696, Rev AA
September 2004
Rosemount 848L
www.rosemount.com
Appendix D Logic Equation Syntax
Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-4
Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-5
1. All lines shall end with a semi-colon.
2. Accepted characters shall be standard 7-bit ASCII characters from
the list below:
•A-Z
•a-z
•0-9
• , (comma)
• ( ) (parenthesis)
• (space)
• ; (semicolon)
• _ (underscore)
3. The maximum number of characters per equation shall be 80.
4. Function calls are in the form FUNC(PARAM1,PARAM2,...PARAMN)
where FUNC is one of the supported functions in Table D-1 on
page D-2, and PARAMx are expressions to be input to the function.
5. Function names must be one of the names listed in the table below.
6. All spaces shall be ignored except within function names and function
parameters.
7. The parameters in a function call shall contain at least the required
parameters shown in table 2, but no more than the maximum.
8. The number of times a function is used (totaled in all equations) must
be less than or equal to the maximum number of instances allowed
shown in Table D-1 on page D-2.
9. Each equation must evaluate to a single boolean value.