Function Blocks
3/99 Function Block Reference Guide 111
2.40 4MUL Function Block
Description
The
4MUL
label stands for
Multiplication Mathematical Operation (4Inputs)
.
This block is part of the
Math
category. It looks like this graphically on the Control Builder.
Function
Multiplies four inputs to get an output.
Input
X1 = First analog value
X2 = Second analog value
X3 = Third Analog value
Y = Fourth Analog value
Note: All four inputs must be connected, Unconnected inputs default to zero. If only 3 inputs are needed,
the 4
th
should be connected to a constant value of 1.
Output
OUT = Calculated analog value
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 2-37 shows correct and incorrect example of a 4MUL function block. Note that all unused inputs
must be connected to a constant value of one.
CORRECT
INCORRECT
Figure 2-37 4MUL Function Block Example
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