IN : DINT Integer value
Q : DINT Integer negation of the input
| IN | Q |
|---|---|
| 0 | 0 |
| 1 | -1 |
| -123 | 123 |
In FBD"Function block diagram" A function block diagram describes a function between input variables and output variables. A function is described as a set of elementary blocks and FFLD language, the block "NEG" can be used.
In FFLD language, the operation is executed only if the input rung (EN) is TRUE. The output rung (ENO) keeps the same value as the input rung.
This feature is not available in IL"Instruction list" This is a low-level language and resembles assembly language. In ST"Structured text" A high-level language that is block structured and syntactically resembles Pascal language, "-" can be followed by a complex Boolean expression between parentheses.
Q := -IN;
Q := - (IN1 + IN2);
(* The negation is executed only if EN is TRUE *)
(* ENO keeps the same value as EN *)
Not available
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