Emerson manual Appendix D Logic Equation Syntax, Rosemount 848L, Reference Manual

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L

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.

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