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Comparison Operation Instruction: 16-bit Data Comparison - Mitsubishi Electric A800 Programming Manual

800 series, plc function.
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Basic instruction (16-bit)
3.26.2
Comparison operation instruction:
16-bit data comparison ... =, <>, >, <=, <, >=
Bit device
X
Y
M
S1
S2
Function
• 16-bit comparison operation is handled as NO contact.
• Comparison operation results are as follows.
Instruction
symbol inside
=
S1
<>
S1
>
S1
<=
S1
<
S1
>=
S1
Execution condition
The execution conditions for LD
Instruction
Each scan execution
LD
Executed when the previous contact instruction is ON
AND
Each scan execution
OR
NOTE
• When the digit setting of a bit device is other than K4 and a start bit device value is other than a multiple of 8, the number of
steps is 7.
142
Sequence program
Applicable device
Word (16-bit) device
T
C
D
Comparison
Condition
operation
results
S2
=
S2
>
S2
Conducted
S2
S2
<
S2
, AND
and OR
Execution condition
Constant
Level
specification
K
H
N
K1 to K4
Instruction symbol inside
=, <>, >, <=, <, >=
Setting data
Start number of the
S1
comparison data or the
device in which the
S2
comparison data is stored
Instruction
symbol inside
=
<>
>
<=
<
>=
are as follows.
Error flag
Digit
(SM0)
Comparison
Condition
operation
results
S1
S2
S1
S2
=
S1
S2
Not conducted
S1
S2
>
S1
S2
S1
<
S2

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F800

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