8 APPLICATION INSTRUCTION
8.9 Real Number Instruction
533
8
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 and the FBD/LD 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.
Ladder diagram
Structured text
ENO:=EXPP(EN,s,d);
FBD/LD
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
ANYREAL_32
(d)
Head device number for storing the operation result
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)
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.
(s)
(d)
EN
ENO
d
s
(s)+1
(s)
(d)+1
(d)
e ( )
Single-precision real number
Single-precision real number
Summary of Contents for MELSEC iQ-F FX5
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