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107
PLC Instructions
4
PLC FUNCTION
Master
control
Master control start 5
Master control reset 3
Program
end
—
Must be written at the end of
sequence program to return to
step 0.
1
No
operation
—
No operation
For program deletion or space
1
—
No operation
Line feed instruction for printer
output
1
16-bit data
comparison
Continuity when (S1) = (S2)
Non-continuity when (S1) ≠ (S2)
5
7
5
7
5
7
Continuity when (S1) ≠ (S2)
Non-continuity when (S1) = (S2)
5
7
5
7
5
7
Continuity when (S1) > (S2)
Non-continuity when (S1) ≤ (S2)
5
7
5
7
5
7
Continuity when (S1) ≤ (S2)
Non-continuity when (S1) > (S2)
5
7
5
7
5
7
Continuity when (S1) < (S2)
Non-continuity when (S1) ≥ (S2)
5
7
5
7
5
7
Classification
Instruction
Symbol
Symbol Processing
Execution
Condition
Number of Steps
M C
MC
D
n
MCR
MCR n
END
NOP
NOPLF
LD=
S1 S2
=
AND=
S1 S2
=
OR=
S1 S2
=
LD<>
S1 S2
< >
AND<>
S1 S2
< >
OR<>
S1 S2
< >
LD>
S1 S2
>
AND>
S1 S2
>
OR>
S1 S2
>
LD<=
S1 S2
< =
AND<=
S1 S2
< =
OR<=
S1 S2
< =
LD<
S1 S2
<
AND<
S1 S2
<
OR<
S1 S2
<