Not Function Block; Figure 2-39 Not Function Block Example - Honeywell UMC800 Reference Manual

2.42 NOT Function Block

Description
The NOT label stands for the NOT Boolean logic function or Logic Inverter. This block is part of the
Logic and Fast Logic categories. It looks like this graphically on the Control Builder.
Function
Reverse state of a digital input (X).
•
Input
X = Digital signal
Output
OUT = Complement of input signal
Block Properties
Double click on the function block to access the function block properties dialog box.
Block Order (Read Only)
You can change the assigned execution order number by selecting "Execution Order" in the "Configure"
menu and arrange the order to suit your control strategy.
Example
Figure 2-39 shows a Function Block Diagram using a NOT function block. Use a single input to place a
loop in manual when the input is ON(1) and return to Auto when OFF(0).
3/99
OR
OUT = Opposite state of X.
If X = ON, then: OUT = OFF.
IF X = OFF, then: OUT = ON.

Figure 2-39 NOT Function Block Example

Function Block Reference Guide
Fast Logic
Function Blocks
113