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Symbols used in the scheme logic and their meanings are as follows:
Signal names
Marked with
Marked with
Marked with [
Marked with "
Unmarked
AND gates
A
B
C
A
B
C
A
B
C
OR gates
A
B
C
A
B
C
A
B
C
XOR gates
A
B
: Measuring element output signal
: Binary signal input from or output to the external equipment
]
:
"
:
: Internal scheme logic signal
&
Output
&
Output
Output
&
≥1
Output
≥1
Output
≥1
Output
=1
Output
258
Scheme switch
Scheme switch position
A
B
1
1
Other cases
A
B
1
1
Other cases
A
B
1
0
Other cases
A
B
0
0
Other cases
A
B
0
0
Other cases
A
B
0
1
Other cases
A
0
1
Other cases
6 F 2 T 0 1 7 2
C
Output
1
1
0
C
Output
0
1
0
C
Output
0
1
0
C
Output
0
0
1
C
Output
1
0
1
C
Output
1
0
1
B
Output
1
1
0
1
0
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