
2.7.19 LOGIC C
The Logic C module executes a selected function on two input variables A and B to produce an out-
put. Input variables A and B, as well as the output, are all logic values (0/1). The table below lists
the input variables; an illustration of the Logic C module follows the table. The function code (FC)
to be executed by the Logic C module is selected from the Logic Functions table at the bottom of
the page and entered into datapoint B172.
Inputs
WIRELIST SYMBOL DATA
TYPE
ASSIGNED VALUE
B170 A L
B171 B L
B172 FC N/A
Output Datapoint:
L093
Logic Functions
FC OUTPUT FC OUTPUT
0A4A OR NOT B
1 A OR B 5 A AND NOT B
2 A AND B 6 J-K LATCH
3 A XOR B 7 D LATCH
Invert output if FC = FC + 128
Section 2. FCS Modules
LOGC-C
2-27
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