
454
7 APPLICATION INSTRUCTION
7.7 Real Number Instruction
Calculating the exponent of single-precision real number
EXP(P)/DEXP(P)
These instructions calculate the exponent of a value specified by (s), and store the operation result in the device specified by
(d).
The EXP(P) instructions can also be used as DEXP(P).
*1
The EXP instruction is not supported by the ST language. Use EXP of the standard function.
Setting data
■
Descriptions, ranges, and data types
■
Applicable devices
Processing details
• These instructions calculate the exponent of a value specified by (s), and store the operation result in the device specified
by (d).
• In the exponential operation, the base (e) is set to "2.71828".
• The table below shows the related devices.
Operation error
Ladder diagram
Structured text
ENO:=EXPP(EN,s,d);
Operand
Description
Range
Data type
Data type (label)
(s)
Data whose exponent is calculated or head device number
where the data is stored
Single-precision real number
Single-precision real number
(d)
Head device number for storing the operation result
Single-precision real number
Single-precision real number
Operand
Bit
Word
Double word
Indirect
specification
Constant
Others
X, Y, M, L,
SM, F, B, SB
U
\G
T, ST,
C, LC
T, ST, C, D,
W, SD, SW, R
U
\G
Z
LC
LZ
K, H
E
$
(s)
(d)
Device
Name
Description
Condition
Operation
SM700
Carry
The absolute value of the operation result
2
128
The value of (d) is the maximum value (2
128
) of 32-bit real
numbers and the carry flag SM700 turns on.
SM8021
Borrow
The absolute value of the operation result < 2
-126
The value of (d) is the minimum value (2
-126
) of 32-bit real
numbers and the borrow flag SM8021 turns on.
SM8022
Carry
The absolute value of the operation result
2
128
The value of (d) is the maximum value (2
128
) of 32-bit real
numbers and the carry flag SM8022 turns on.
Error code
(SD0/SD8067)
Description
3402
The specified device value is -0, denormalized number, NaN (not a number), or
.
(s)
(d)
(s)+1
(s)
(d)+1
(d)
e ( )
Single-precision real number
Single-precision real number
Summary of Contents for MELSEC iQ-F FX5 series
Page 1: ...MELSEC iQ F FX5 Series Programming Manual Instructions Standard Functions Function Blocks ...
Page 2: ......
Page 21: ...19 PART 1 PART 1 OVERVIEW Part 1 consists of the following chapter 1 OVERVIEW ...
Page 98: ...96 4 STANDARD FUNCTIONS FUNCTION BLOCKS 4 2 Standard Function Blocks MEMO ...
Page 840: ...838 23 TIME DATA FUNCTIONS 23 4 Division MEMO ...
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