
412
7 APPLICATION INSTRUCTION
7.7 Real Number Instruction
Subtracting single-precision real numbers
E-(P) [For 2 operands]
These instructions subtract the single-precision real number in the device specified by (s) from the single-precision real
number in the device specified by (d), and store the result in the device specified by (d).
Setting data
■
Descriptions, ranges, and data types
■
Applicable devices
Processing details
• These instructions subtract the single-precision real number in the device specified by (s) from the single-precision real
number in the device specified by (d), and store the result in the device specified by (d).
• Values in the devices specified (stored) by (s) and (d) should be 0 or 2
-126
|specified value (stored value)| <2
128
.
• When an input value is set from the engineering tool, a rounding error may be occur.
• The table below shows the related devices.
Operation error
Ladder diagram
Structured text
Not supported
Operand
Description
Range
Data type
Data type (label)
(s)
Subtrahend data or the head device number where the data
to be subtracted from another is stored
0, 2
-126
|(s)|<2
128
Single-precision real number
Single-precision real number
(d)
Head device number where the data from which another is
to be subtracted is stored
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.
SM8020
Zero
The operation result is true "0".
(The mantissa part is "0").
The zero flag SM8020 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
.
The value stored in specified device is outside the following range
0, 2
-126
|specified device value|<2
128
(s)
(d)
-
(d)
(d)+1
(s)
(s)+1
(d)
(d)+1
Single-precision real number
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 ...
Page 887: ......