Mitsubishi Electric MELSEC FX Series - 7.12.15 DESQR

7 Applied Instructions
7.12 Floating Point
487
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
7.12.15 DESQR
Outline
This instruction executes the square root operation of binary floating decimal point.
→ 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".
Function and operation explanation
1. 32-bit operation (DESQR, DESQRP)
The data in the device specified by is operated by square root (binary floating decimal point), and the
result is transferred to the device specified by .
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
DESQR 32 bits Continuous DESQR(EN, s, d);
DESQRP 32 bits Pulse DESQRP(EN, s, d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Device for storing binary floating decimal point data for square root
operation
FLOAT(Single
Precision)
Output
variable
ENO Execution state Bit
Device for storing binary floating decimal point data after square root
operation
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
z
DESQR
EN ENO
d
s
DESQRP
EN ENO
d
s
Command
input
DESQR
EN ENO
d
s
Binary floating
decimal point
[ +1, ]
d
s
Binary floating
decimal point
s
[ +1, ]
d
→
Label 1
*1
Label 2
*2
*1. To define the device for storing binary floating
decimal point data for square root operation
*2. To define the device for storing binary floating
decimal point data after operation of square root