Chapter 9
146
Logic programming – Function blocks
Priority-to-binary (input 1 dominant)
In this mode, all outputs are set to Low, if input 1 is High, regardless of the other inputs.
If input 1 is Low, the function block behaves as in
Priority
mode. If all inputs are Low
at the same time, all outputs are set to Low and
Fault present
becomes High.
Truth tables for the Binary encoder function block
The following applies for the truth tables in this section:
“0” means logic Low.
“1” means logic High.
“x” means “any” = “0” or “1”.
Input 2
Input 1
Output A
Fault
present
0
0 0 1
0
1 0 0
1
0 1 0
1
1 0 1
Input 8 Input 7 Input 6 Input 5 Input 4 Input 3 Input 2 Input 1
Output
C
Output
B
Output
A
Fault
present
0
0
0
0
0
0
0
0 0 0 0 1
0
0
0
0
0
0
0
1 0 0 0 0
0
0
0
0
0
0
1
0 0 0 1 0
0
0
0
0
0
1
0
0 0 1 0 0
0
0
0
0
1
0
0
0 0 1 1 0
0
0
0
1
0
0
0
0 1 0 0 0
0
0
1
0
0
0
0
0 1 0 1 0
0
1
0
0
0
0
0
0 1 1 0 0
1
0
0
0
0
0
0
0 1 1 1 0
More than one input = 1
0
0
0
1
Table 46:
Truth table for the Binary encoder function block with 8 inputs in One out of N mode
Input 2
Input 1
Output A
Fault
present
0
0 0 1
0
1 0 0
1
x 1 0
Table 45:
Truth table for the Binary
encoder function block with
2 inputs in One out of N
mode
Table 47:
Truth table for the Binary
encoder function block with
2 inputs in Priority mode
Summary of Contents for SW1DNN-WS0ADR-B
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