Logic (2 Input) Block; Parameters - Siemens FEC920 User Manual

6.12

LOGIC (2 INPUT) BLOCK

Part of the 'Toolkit Blocks' option, this block allows a number of logic and comparison operations to be
performed on a pair of inputs. For logic functions, the inputs can be inverted to allow, for example, a NOR
function to be implemented by inverting the inputs to an AND function. 12 two-input logic blocks are available.

6.12.1 Parameters

Operation
Input 1(2)
Fallback
Invert
Output
Status
Page 104
FEC920: USER GUIDE
Operation
Figure 92 Two-input logic block configuration
AND, OR, XOR, LATCH (boolean values only)
== (Input 1 = Input 2)
<> (Input 1 Input 2)
< (Input 1 < Input 2}
<= (Input 1 Input 2)
> (Input 1 > Input 2)
=> (Input 1 Input 2)
The inputs to the specified operation. For inverted inputs (below), this shows the 'real'
(non-inverted) state.
Configures the output and status values to be used if either input has a status other than
'Good'.
FalseBad: Output = False; Status = Bad
TrueBad: Output = True; Status = Bad
FalseGood: Output = False; Status = Good
TrueGood: Output = True; Status = Good
For logic operators only allows neither, either or both inputs to be inverted. Input 1 and
Input 2 show the non-inverted state.
On or Off depending on input states etc.
The status of the result ('Ok' or 'Error').
A5E45696052A Rev-AA
Logic (2 input).1
OR
Input 1 1
Input 2 0
Fallback FalseBad
Invert None
Output On
Status Ok
September 18