# Math (2 Input); Parameters - Siemens FEC920 User Manual

Flow energy calculator.

6.15

## MATH (2 INPUT)

This 'Toolkit' option block allows one of a number of operations to be carried out using two input values which
may be analog or digital in nature. Either or both of the inputs can be scaled, using a 'Multiplier'.

### 6.15.1 Parameters

Operation
Page 108
FEC920: USER GUIDE
Input 1
Input 1 Multiplier
Input 2
Input 2 Multiplier
Figure 96 Block schematic
Operation
Input 1 Multiplier
Input 2 Multiplier
Resolution
Low Limit
High limit
Fallback Strategy
Fallback Value
Input Selector
Input 1
Input 2
Output
Status
Figure 97 Block configuration (typical)
Output = Input 1 + Input 2
Subtract
Output = Input 1 - Input 2
Multiply
Output = Input 1 x Input 2
Divide
Output = Input 1 ÷ Input 2
Abs Diff
Output = the difference between Input 1 and Input 2, ignoring sign
Select Max
Output = whichever is the larger of Input 1 or Input 2
Select Min
Output = whichever is the smaller of Input 1 or Input 2
Hot Swap
Output = Input 2 if Input 1 is 'Bad'; otherwise Output = Input 1
Sample/Hold
Output tracks Input 1 whilst Input 2 = 1. Output value is held whilst Input
2 = 0 (See Section 6.15.2, below, for more details)
Power*
Output = Input 1 to the power of Input 2. (Output = Input 1
Square Root
Output = Sqrt Input 1 (Input 2 ignored)
Log Base 10
Output = Log
Log Base e
Output = Ln Input 1 (Input 2 ignored)
Exponential
Output = e
10 to the X
Output = 10
A5E45696052A Rev-AA
Math (2 input)
block
Math (2 input).1
Sel1
1.0
1.0
DegC
Units
2
0.00
DegC
50.00
DegC
ClipGood
0.0 DegC
Input1
30.28 °C
1.40
30.28 DegC
Ok
Input 1 (Input 2 ignored)
10
Input1
(Input 2 ignored)
Input 1
(Input 2 ignored)
Output
Input 2
September 18
)