Mitsubishi MELSEC QCPU User Manual

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MELSEC-Q/QnA
6 BASIC INSTRUCTIONS
High Performance
QnA Q4AR
Basic
QCPU
PLC CPU
Process CPU
6.1.3 Floating decimal point data comparisons (E
=
, E
< >
, E>, E
<=
, E
<
, E
>=
)
Usable Devices
Internal Devices
(System, User)
MELSECNET/10(H)
Direct J
\
Set
Data
Bit Word
File
Register
Bit Word
Special
Function
Module
U
\G
Index
Register
Zn
Constant
E
Other
S1
S2
[Instruction Symbol] [Execution Condition]
indicates the signs E
=
, E
< >
, E
>
, E
<=
, E
<
, or E
>=
S1
S2
S1
S2
S1
S2
LD
AND
OR
[Set Data]
Set Data Meaning Data Type
S1
S2
Comparative data, or device number where comparative data is stored Real number
[Functions]
(1) The floating decimal point data from device designated by
S1
and floating decimal point data
from device designated by
S2
as A contact, and performs comparison operation.
(2)The results of the comparison operations for the individual instructions are as follows.
Instruction
Symbol
in
Condition
Comparison
Operation
Result
Instruction
Symbol
in
Condition
Comparison
Operation
Result
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
E
S1 S2
Continuity
E
S1 S2
Non-continuity
POINT
Note that use of the = instruction can on occasion result in situations where errors cause the
two values to not be equal.
EMOV E1.23 D1
D0 E4.56 D2
E= D0
M0
E
D2 E4.65 D2E/
D2
X0
Something not equal
Example
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Mitsubishi MELSEC QCPU Specifications

General

Brand	Mitsubishi
Model	MELSEC QCPU
Category	Controller
Language	English