EasyManuals Logo

Mitsubishi FX3G Series Programming Manual

Mitsubishi FX3G Series
944 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #501 background imageLoading...
Page #501 background image
499
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.9 FNC121 – ESUB / Floating Point Subtraction
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High-Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
Control
18.9 FNC121 – ESUB / Floating Point Subtraction
Outline
This instruction executes subtraction of two binary floating point data.
For program examples of floating point operations, refer to Section 12.10.
For handling of floating point, refer to Subsection 5.1.3.
For flag operations, refer to Subsection 6.5.2.
1. Instruction format
2. Set data
*1. When a constant (K or H) is specified, it is automatically converted into binary floating point (real number)
when the instruction is executed.
3. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
1. 32-bit operation (DESUB and DESUBP)
Binary floating point data [ +1, ] is subtracted from binary floating point data [ +1, ], and the
subtraction result in the binary floating point format is transferred to [ +1, ].
When a constant (K or H) is specified as [ +1, ] or [ +1, ], it is automatically converted into
binary floating point.
Caution
1. When the same device is specified
The same device number can be specified in [ +1, ],[ +1, ] and [ +1, ].
In this case, note that the subtraction result changes in every operation cycle when the continuous operation type
instruction (DESUB) is used.
Operand Type Description Data Type
Word device number storing binary floating point data used in subtraction
Real number (binary)
*1
Word device number storing binary floating point data used in subtraction
Data register number storing the subtraction result
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G VZModifyKH E ""P
33 S 333 3
33 S 333 3
33 S 3
P
FNC 121
ESUB
D
Mnemonic Operation Condition
16-bit Instruction
DESUB
DESUBP
Mnemonic Operation Condition
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
2
S
2
S
1
S
1
D
D
FNC121
DESUB
Command
input
S
1
S
2
D
[ +1, ]
[ +1, ]
[ +1, ]
Binary floating point Binary floating point Binary floating point
S
1
S
1
S
2
S
2
D
D
S
1
S
1
S
2
S
2
FNC121
DESUB
Command
input
S
1
S
2
D
[ +1, ]
[ K2346 ]
[ +1, ]
Binary floating point Automatically
converted into binary
floating point
Binary floating point
S
1
S
1
D
D
S
1
S
1
S
2
S
2
D
D

Table of Contents

Other manuals for Mitsubishi FX3G Series

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Mitsubishi FX3G Series and is the answer not in the manual?

Mitsubishi FX3G Series Specifications

General IconGeneral
ModelFX3G Series
Power SupplyAC 100-240V or DC 24V
Program Capacity32, 000 steps
Execution Speed0.21 µs/basic instruction
Communication OptionsRS-422, USB, Ethernet
Expansion ModulesAnalog, digital, communication
Programming LanguageLadder Logic, Instruction List
Built-in FunctionsHigh-speed counters, pulse output
Analog I/OAvailable via expansion modules

Related product manuals