820
7 APPLICATION INSTRUCTIONS
7.9 Real Number Instructions
Processing details
• These instructions calculate the exponent of the value specified by (s), and store the operation result in the device specified
by (d).
• Exponent operation is performed with the base (e) set to "2.71828".
• When an input value is set using the engineering tool, a rounding error may occur. Refer to the following for the precautions
on setting input values using the engineering tool.
Operation error
• The EXP(P) instruction performs operation using the natural logarithm. To determine a value using the
common logarithm, determine a value by dividing the common logarithm value by 0.43429 and specify it in
the device specified by (s).
Error code
(SD0)
Description
3402H
The value input to (s) is -0, a subnormal number, NaN (not a number), or
.
3403H
The data output from (d) exceeds the following range. (An overflow has occurred.)
|(d)|<2
128
(s)+1
(s)
(d)+1
(d)
( )
Single-precision real number
Single-precision real number
10
X
= e
0.43429
X
Summary of Contents for MELSEC iQ-R Series
Page 1: ...MELSEC iQ R Programming Manual Instructions Standard Functions Function Blocks ...
Page 2: ......
Page 24: ...22 INDEX 2092 INSTRUCTION INDEX 2093 REVISIONS 2104 WARRANTY 2105 TRADEMARKS 2106 ...
Page 34: ...32 MEMO ...
Page 35: ...33 PART 1 PART 1 OVERVIEW This part consists of the following chapter 1 OVERVIEW ...
Page 68: ...66 1 OVERVIEW 1 5 Precautions on Programming MEMO ...
Page 1448: ...1446 14 REDUNDANT SYSTEM INSTRUCTIONS 14 2 Disabling Enabling System Switching MEMO ...
Page 1972: ...1970 33 TIME DATA TYPE FUNCTIONS 33 4 Division MEMO ...
Page 2067: ...APPX Appendix 5 PID Control Program Examples 2065 A 252 Set PID control data for loop 2 ...
Page 2109: ......