Mitsubishi Electric MELSEC FX Series - 7.12.9 DESUB

7 Applied Instructions
7.12 Floating Point
475
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of Instruction
4
How to Read Explanation of Instructions
5
Basic Instruction
6
Step Ladder Instructions
7
Applied Instructions
8
Interrupt Function and Pulse Catch Function
A
Relationships between devices and addresses
7.12.9 DESUB
Outline
This instruction subtracts two binary floating decimal points.
→ As for program example of floating decimal point operation, refer to section 7.5.10.
→ As for handling of floating decimal point, refer to FX Structured Programming Manual (Device &
Common).
→ As for the operation of the flag, refer to the FX Structured Programming Manual (Device &
Common).
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder ST
DESUB 32 bits Continuous DESUB(EN, s1, s2, d);
DESUBP 32 bits Pulse DESUBP(EN, s1, s2, d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Device for storing binary floating decimal point data to be subtracted.
FLOAT(Single
Precision)
Device for storing binary floating decimal point data to be subtracted.
FLOAT(Single
Precision)
Output
variable
ENO Execution state Bit
Device for storing the subtracted binary floating decimal point data.
FLOAT(Single
Precision)
Operand
type
Bit Devices Word Devices Others
System user Digit designation
System
user
Special
unit
Index
Cons
tant
Real
Number
Character
String
Pointer
XYMTCS
D
.b
KnX KnY KnM KnS T C D R
U\G
VZModifierK H E
""
P
z
S1 S2
zzz
S1
z
S1 S2
zzz
S1
z
S1 S2
z
DESUB
EN
s1
s2
ENO
d
DESUBP
EN
s1
s2
ENO
d