506
8 APPLICATION INSTRUCTION
8.9 Real Number Instruction
Converting character string to single-precision real number
EVAL(P)/DEVAL(P)
These instructions convert the character strings in the device areas specified by (s) and later to single-precision real number,
and store the converted data in the device specified by (d).
The EVAL(P) instructions can also be used as DEVAL(P).
Setting data
■
Descriptions, ranges, and data types
■
Applicable devices
*1 T, ST, C cannot be used.
Processing details
• These instructions convert the character strings in the device areas specified by (s) and later to single-precision real
number, and store the converted data in the device specified by (d).
• A specified character string may be in the decimal point format or exponent format. A character string in either format can
be converted into single-precision real number.
• A character string can consist of up to 24 characters. 20H (space) and 30H (0) in a character string are counted as one
character each.
Ladder diagram
Structured text
ENO:=EVAL(EN,s,d);
ENO:=EVALP(EN,s,d);
FBD/LD
Operand Description
Range
Data type
Data type (label)
(s)
Character string data to be converted to single-precision
real number or head device number where the character
string data is stored
Character string
ANYSTRING_SINGLE
(d)
Head device number storing converted single-precision real
number
Single-precision real number
ANYREAL_32
EN
Execution condition
Bit
BOOL
ENO
Execution result
Bit
BOOL
Operand
Bit
Word
Double word Indirect
specification
Constant
Others
X, Y, M, L, SM,
F, B, SB, S
T, ST, C, D, W,
SD, SW, R
U
\G
Z
LC
LZ
K, H
E
$
(s)
(d)
(1): Indicates the end of the character string.
(2): Single-precision real number
(s)
(d)
EN
ENO
d
s
(s)
(s)+1
(s)+2
(s)+3
(s)+4
b15
b0
b7
b8
00H
(d)
(d)+1
ASCII code for 1st character
ASCII code for 3rd character
ASCII code for 5th character
ASCII code for sign
ASCII code for 2nd character
ASCII code for 4th character
ASCII code for 7th character
ASCII code for 6th character
(1)
(2)
Содержание MELSEC iQ-F FX5
Страница 1: ...MELSEC iQ F FX5 Programming Manual Instructions Standard Functions Function Blocks ...
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Страница 17: ...15 CONTENTS ...
Страница 24: ...22 MEMO ...
Страница 25: ...23 PART 1 PART 1 OVERVIEW Part 1 consists of the following chapter 1 OVERVIEW 2 PRECAUTIONS ON PROGRAMMING ...
Страница 126: ...124 6 SEQUENCE INSTRUCTIONS 6 3 Output Instructions Operation error There is no operation error ...
Страница 132: ...130 6 SEQUENCE INSTRUCTIONS 6 3 Output Instructions Operation error There is no operation error ...
Страница 140: ...138 6 SEQUENCE INSTRUCTIONS 6 3 Output Instructions Operation error There is no operation error ...
Страница 191: ...7 BASIC INSTRUCTIONS 7 2 Arithmetic Operation Instructions 189 7 Operation error There is no operation error ...
Страница 202: ...200 7 BASIC INSTRUCTIONS 7 2 Arithmetic Operation Instructions Operation error There is no operation error ...
Страница 278: ...276 7 BASIC INSTRUCTIONS 7 4 Bit Processing Instructions Operation error There is no operation error ...
Страница 280: ...278 7 BASIC INSTRUCTIONS 7 4 Bit Processing Instructions Operation error There is no operation error ...
Страница 915: ...18 TYPE CONVERSION FUNCTIONS 18 13 Converting DWORD to WORD 913 18 Operation error There is no operation error ...
Страница 917: ...18 TYPE CONVERSION FUNCTIONS 18 14 Converting DWORD to INT 915 18 Operation error There is no operation error ...
Страница 932: ...930 18 TYPE CONVERSION FUNCTIONS 18 26 Converting DINT to WORD Operation error There is no operation error ...
Страница 1050: ...1048 26 TIME DATA FUNCTIONS 26 4 Division MEMO ...
Страница 1068: ...1066 29 COUNTER FUNCTION BLOCKS 29 4 Counter Function Block Operation error There is no error ...
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