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Programming system for programmable logic controller
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US. Patent
Aug. 17, 1993
Sheet 1 of 6
12
5,237,652
_—*>
M
PROGRAMMABLE
>
LOGIC
___o 14
CONTROLLER
'
a’) j
20*” MICROPROCESSOR ____o
22 ‘f4 MEMORY
'—*>
FIG. 1.
44
A
40
x30
B
C
Vll
W—( >
32/‘ 343 42 ‘K36
FIGZQ
.A;
I
I
7 :3:
50
v
52
C
D
