Or instruction, Or instruction diagram, Or instruction truth tables – Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual User Manual
Page 206: Or instruction diagram or instruction truth tables
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Rockwell Automation Publication 1752-UM001E-EN-P - June 2014
Appendix C
Logic Functions Command Reference
OR Instruction
The Output is the logical OR of up to eight input conditions. The number of
inputs can be set by using the In/Out Setting tab in the Function Block
Properties dialog box. The default setting is two inputs.
OR Instruction Diagram
OR Instruction Truth Tables
In the truth table, 0 is off and 1 is on. Lowercase x is don’t care.
Table 41 - Truth Table for Eight-input AND Evaluation
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
Input 7
Input 8
Output 1
0
x
x
x
x
x
x
x
0
x
0
x
x
x
x
x
x
0
x
x
0
x
x
x
x
x
0
x
x
x
0
x
x
x
x
0
x
x
x
x
0
x
x
x
0
x
x
x
x
x
0
x
x
0
x
x
x
x
x
x
0
x
0
x
x
x
x
x
x
x
0
0
1
1
1
1
1
1
1
1
1
Table 42 - Truth Table for One-input OR Evaluation
Input 1
Output 1
0
0
1
1
Table 43 - Truth Table for Two-input OR Evaluation
Input 1
Input 2
Output 1
0
0
0
1
x
1
x
1
1
Output 1
Input 1
Input 2