Chapter 6 FBD Block Diagram Programming 146
NAND Logic Diagram
FBD:
LADDER:
=
Not(I01 And I02 And I03)
Note: The input terminal is NOP which is equivalent to ‘‘Hi”;
The B output ON when one of the input terminals status is OFF;
NAND (EDGE) Logic Diagram
FBD:
LADDER:
=
Not(I01 And I02 And I03) And D
Note: The input terminal is NOP which is equivalent to ‘‘Hi”;
If change one input terminal to OFF when all input terminals are ON, the B output ON a scan cycle time;
OR Logic Diagram
FBD:
LADDER:
=
I01 or I02 or I03
Note: The input terminal is NOP which is equivalent to ‘‘Lo”;
The B output ON when one of the input terminals status is ON;
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