Siemens SITRANS FEC920, Руководство пользователя

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FEC920: USER GUIDE
Page 108 September 18
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’.
Figure 96 Block schematic
Figure 97 Block configuration (typical)
6.15.1 Parameters
Operation Add 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
Input 2
)
Square Root Output = Sqrt Input 1 (Input 2 ignored)
Log Base 10 Output = Log
10
Input 1 (Input 2 ignored)
Log Base e Output = Ln Input 1 (Input 2 ignored)
Exponential Output = e
Input1
(Input 2 ignored)
10 to the X Output = 10
Input 1
(Input 2 ignored)
Input 1
Input 1 Multiplier
Input 2
Input 2 Multiplier
Output
Math (2 input)
block
Sel1
1.0
1.0
DegC
2
0.00
DegC
50.00
DegC
Operation
Input 1 Multiplier
Input 2 Multiplier
Units
Resolution
Low Limit
High limit
Math (2 input).1
ClipGood
0.0 DegC
Input1
30.28 °C
1.40
30.28 DegC
Ok
Fallback Strategy
Fallback Value
Input Selector
Input 1
Input 2
Output
Status
A5E45696052A Rev-AA