FEC920: USER GUIDE
Page 104
September 18
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.
Figure 92 Two-input logic block configuration
6.12.1 Parameters
Operation
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)
Input 1(2)
The inputs to the specified operation. For inverted inputs (below), this shows the ‘real’
(non-inverted) state.
Fallback
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
Invert
For logic operators only allows neither, either or both inputs to be inverted. Input 1 and
Input 2 show the non-inverted state.
Output
On or Off depending on input states etc.
Status
The status of the result (‘Ok’ or ‘Error’).
OR
1
0
FalseBad
None
On
Ok
Operation
Input 1
Input 2
Fallback
Invert
Output
Status
Logic (2 input).1
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