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Function Blocks

Function Block Reference Guide 3/99112

2.41 NEG Function Block

Description

The

NEG

label stands for

Negate

This block is part of the

Calculations

category. It looks like this

graphically on the Control Builder.

Function

Convert a value to the opposite sign; i.e., +5 IN = –5 OUT, –6 IN = +6 OUT.

(Invert sign of an analog value.)

Input

X = positive or negative analog value

Output

Y = analog value of opposite sign from input

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 2-38 shows a Function Block Diagram using a NEG function block.

Figure 2-38 NEG Function Block Example

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