Creating Logic Equations - ABB SM2000 User Manual Supplement

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3.3 Creating Logic Equations – Fig. 3.2
Fig. 3.2 Launching the Equation Editor
IM/SM2000ADV Issue 7
Select the logic equation to create or modify
Specify the first operand – can be any digital signal.
Invert the signal, if required.
Select an operator for the next input
Inputs
All inputs high
Any (or All) input(s) low
Any (or All) input(s) high
No inputs high
Any, but not All, input(s) high
Table 3.1 Logic Operators
Repeat these steps until the equation is complete.
Set the equation tag (20 characters maximum) displayed in
alarm/event logs.
Allow changes in the equation's state to be recorded in the
Alarm event log.
3 Logic Configuration
A
0
0
1
B
0
1
0
Operators
Outputs
AND
0
0
1
NAND
1
1
1
OR
0
1
1
NOR
1
0
0
XOR
0
1
1
1
0
1
0
1
0
0
19

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