Honeywell UMC800 Reference Guide

Function Blocks
3/99 Function Block Reference Guide 95
2.34 MATH Function Block
Description
The
MATH
label stands for
Free Form Math
. This block is part of the
Math
category. It looks like this
graphically on the Control Builder.
Function
Read inputs A through H and calculates the output based on specified general purpose calculation. OUT is
calculated from an equation entered here.
Offers the following general purpose calculation functions:
– abs = addition,
– EXP = exponential (ln
-1
),
– Ln = natural log (log base e),
– Log 10 = log base 10,
– neg(Unary) - = negation,
– sqrt = Square Root,
– + = addition,
– - = subtraction,
– * = multiplication,
– / = division,
– ^ = raised to power of (x
y
)
– ( = left parenthesis,
– ) = right parenthesis, and
• A maximum of either 50 tokens(note 1) per equation or 100 characters per line is allowed,
whichever is first exceeded.
Note 1:
A token is an operation, variable, or pair of parenthesis; the end of an equation counts as one
token.
Inputs
IN A – block input 1
IN B – block input 2
IN C – block input 3
IN D – block input 4
IN E – block input 5
IN F – block input 6
IN G – block input 7
IN H – block input 8
Continued next page

Honeywell UMC800 Specifications

General

Brand	Honeywell
Model	UMC800
Category	Controller
Language	English