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6 BASIC INSTRUCTIONS
6.1.3 Floating decimal point data comparisons (E = , E < > , E>, E <= , E < , E >= )
Internal Devices
Set
(System, User)
Data
Bit
Word
S1
S2
[Instruction Symbol] [Execution Condition]
LD
AND
OR
[Set Data]
Set Data
S1
S2
[Functions]
(1) The floating decimal point data from device designated by
from device designated by
(2)The results of the comparison operations for the individual instructions are as follows.
Instruction
Symbol
in
E
E
E
E
E
E
POINT
Note that use of the = instruction can on occasion result in situations where errors cause the
two values to not be equal.
6 - 6
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MELSECNET/10(H)
File
Direct J \
Register
Bit
Comparative data, or device number where comparative data is stored
as A contact, and performs comparison operation.
S2
Comparison
Condition
Operation
Result
S1
S2
S1
S2
S1
S2
Continuity
S1
S2
S1
S2
S1
S2
X0
Example
QCPU
PLC CPU
Basic
High Performance
Usable Devices
Special
Function
Module
Word
U \G
indicates the signs E = , E < > , E > , E <= , E < , or E >=
S1
S1
S1
Meaning
S1
Instruction
Symbol
in
E
E
E
E
E
E
EMOV E1.23 D1
E
D0
E4.56 D2
E/
D2
E4.65 D2
E=
D0
D2
Something not equal
MELSEC-Q/QnA
QnA
Process CPU
Index
Constant
Register
E
Zn
S2
S2
S2
Data Type
Real number
and floating decimal point data
Comparison
Condition
Operation
Result
S1
S2
S1
S2
S1
S2
Non-continuity
S1
S2
S1
S2
S1
S2
M0
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Q4AR
Other
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