4Mul Function Block; Figure 2-37 4Mul Function Block Example - Honeywell UMC800 Reference Manual

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,
th
the 4 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
3/99

Figure 2-37 4MUL Function Block Example

Function Block Reference Guide
Function Blocks
INCORRECT
111