Mitsubishi Electric MELSEC FX Series - 7.12 Floating Point; 7.12.1 DECMP

7 Applied Instructions
7.12 Floating Point
449
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 Floating Point
7.12.1 DECMP
Outline
This instruction compares two data (binary floating decimal point), and issues the result of greater, smaller, or
equal to the bit device (3 points).
→ As for handling of floating decimal point, refer to 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
DECMP 32 bits Continuous DECMP(EN, s1, s2, d);
DECMPP 32 bits Pulse DECMPP(EN, s1, s2, d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Device for storing binary floating point data to be compared
FLOAT(Single
Precision)
Device for storing binary floating point data to be compared
FLOAT(Single
Precision)
Output
variable
ENO Execution state Bit
Head bit device for output of result (3 points occupied) Bit
Operand
type
Bit Devices Word Devices Others
System user Digit designation System user
Special
unit
Index
Con
stant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS T C D R
U\G
V Z Modifier K H E
""
P
z
S1 S2
zzz
S1
z
S1 S2
zzz
S1
zz z
S3
z
DECMP
EN
s1
s2
ENO
d
DECMPP
EN
s1
s2
ENO
d