Mitsubishi MELSEC iQ-F FX5 series

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16 SINGLE NUMBER VARIABLE FUNCTIONS

16.4 Calculating the Common Logarithm

769

Operation error

• When (s) is REAL

Error code

(SD0/SD8067)

Description

3402 The value specified in (s) is -0, denormalized number, NaN (not a number), or .

3403 The value of (d) exceeds the following range. (An overflow has occurred.)

|(d)|<2

128

3405 Data outside the allowable range was set to (s).

• A negative value is specified.

• "0" is specified.

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Default Chapter3
- Introduction3
- Safety Precautions3
- Table of Contents4
- Relevant Manuals16
- Terms16
- How to Read this Manual18
Chapter 1 Overview21
- Part 1 Overview21
- Instruction Configuration22
- Data Specification Method23
- Execution Condition35
- Precautions on Programming36
- Part 2 Instruction/Function List43
Chapter 2 Cpu Module Instruction44
- Sequence Instruction44
- Basic Instruction48
- Application Instruction62
- Built-In Ethernet Function Instruction80
Chapter 3 Module Specific Instruction81
- External Device I/O Instruction81
- High-Speed Counter Instruction81
- Positioning Instruction82
- Inverter Communication Instruction83
- MODBUS Communication Instruction83
- BFM Device Read/ Write Instruction84
Chapter 4 Standard Functions/Function Blocks85
- Standard Functions85
- Standard Function Blocks96
- Part 3 Cpu Module Instructions99
Chapter 5 Sequence Instructions100
- Contact Instructions100
- Association Instruction106
- Output Instructions110
- Shift Instructions127
- Master Control Instruction139
  - Setting/Resetting the Master Control139
- Termination Instructions143
  - Ending the Main Routine Program143
  - Ending the Sequence Program144
- Stop Instruction145
  - Stopping the Sequence Program145
- No Processing Instruction146
  - No Operation146
Chapter 6 Basic Instructions147
- Comparison Operation Instructions147
- Arithmetic Operation Instructions163
- Logical Operation Instructions217
- Bit Processing Instructions237
- Data Conversion Instructions244
- Data Transfer Instructions298
Chapter 7 Application Instruction319
- Rotation Instruction319
  - Rotating 16-Bit Data to the Right319
  - Rotating 16-Bit Data to the Left322
  - Rotating 32-Bit Data to the Right324
  - Rotating 32-Bit Data to the Left326
- Program Branch Instruction328
  - Pointer Branch328
  - Jump to END331
- Program Execution Control Instruction332
  - Disabling/Enabling Interrupt Programs332
  - Disabling the Interrupt Program with Specified Priority or Lower334
  - Interrupt Program Mask337
  - Disabling/Enabling the Specified Interrupt Pointer339
  - Returning from the Interrupt Program340
  - Resetting the Watchdog Timer341
- Structuring Instruction342
  - FOR to NEXT342
  - Forcibly Terminating the for to NEXT Instruction Loop344
  - Calling a Subroutine Program346
  - Returning from the Subroutine Program350
  - Calling a Subroutine Program351
- Data Table Operation Instruction353
  - Reading the Oldest Data from the Data Table353
  - Reading the Newest Data from the Data Table355
  - Writing Data to the Data Table357
  - Inserting Data to the Data Table359
  - Deleting Data from the Data Table361
- Character String Operation Instruction363
  - Comparing Character Strings363
  - Concatenating Character Strings366
  - Transferring Character Strings370
  - Converting 16-Bit Binary Data to Decimal ASCII372
  - Converting 32-Bit Binary Data to Decimal ASCII374
  - Converting HEX Code Data to ASCII376
  - Converting 16-Bit Binary Data to Character String380
  - Converting 32-Bit Binary Data to Character String382
  - Converting Single-Precision Real Number to Character String385
  - Detecting a Character String Length390
  - Extracting Character String Data from the Right392
  - Extracting Character String Data from the Left394
  - Storing the Specified Number of Character Strings396
  - Replacing the Specified Number of Character Strings398
  - Searching Character String400
  - Inserting Character String402
  - Deleting Character String404
- Real Number Instruction406
  - Comparing Single-Precision Real Numbers406
  - Single-Precision Real Number Comparison408
  - Single-Precision Real Number Data Band Comparison410
  - Adding Single-Precision Real Numbers412
  - Subtracting Single-Precision Real Numbers414
  - Adding Single-Precision Real Numbers416
  - Subtracting Single-Precision Real Numbers418
  - Multiplying Single-Precision Real Numbers420
  - Dividing Single-Precision Real Numbers422
  - Multiplying Single-Precision Real Numbers424
  - Dividing Single-Precision Real Numbers426
  - Converting 16-Bit Signed Binary Data to Single-Precision Real Number428
  - Converting 16-Bit Unsigned Binary Data to Single-Precision Real Number429
  - Converting 32-Bit Signed Binary Data to Single-Precision Real Number430
  - Converting 32-Bit Unsigned Binary Data to Single-Precision Real Number431
  - Converting Character String to Single-Precision Real Number432
  - Converting Binary Floating Point to Decimal Floating Point435
  - Converting Decimal Floating Point to Binary Floating Point437
  - Inverting the Sign of Single-Precision Real Number439
  - Transferring Single-Precision Real Number Data440
  - Calculating the Sine of Single-Precision Real Number441
  - Calculating the Cosine of Single-Precision Real Number443
  - Calculating the Tangent of Single-Precision Real Number445
  - Calculating the Arc Sine of Single-Precision Real Number447
  - Calculating the Arc Cosine of Single-Precision Real Number449
  - Calculating the Arc Tangent of Single-Precision Real Number451
  - Converting Single-Precision Real Number Angle to Radian453
  - Converting Single-Precision Real Number Radian to Angle454
  - Calculating the Square Root of Single-Precision Real Number455
  - Calculating the Exponent of Single-Precision Real Number456
  - Calculating the Natural Logarithm of Single-Precision Real Number458
  - Calculating the Exponentiation of Single-Precision Real Number460
  - Calculating the Common Logarithm of Single-Precision Real Number462
  - Searching the Maximum Value of Single-Precision Real Number463
  - Searching the Minimum Value of Single-Precision Real Number465
- Random Number Instruction467
  - Generating Random Number467
- Index Register Operation Instruction468
  - Saving All Data of the Index Register468
  - Returning All Data of the Index Register470
  - Saving the Selected Data of the Index Register and Long Index Register471
  - Returning the Selected Data of the Index Register and Long Index Register473
- Data Control Instruction474
  - Upper and Lower Limit Control of 16-Bit Binary Data474
  - Upper and Lower Limit Control of 32-Bit Binary Data476
  - Dead Band Control of 16-Bit Binary Data478
  - Dead Band Control of 32-Bit Binary Data480
  - Zone Control of 16-Bit Binary Data482
  - Zone Control of 32-Bit Binary Data484
  - Scaling 16-Bit Binary Data (Point Coordinates)486
  - Scaling 32-Bit Binary Data (Point Coordinates)489
  - Scaling 16-Bit Binary Data (XY Coordinates)492
  - Scaling 32-Bit Binary Data (XY Coordinates)495
- Special Timer Instruction498
  - Teaching Timer498
  - Special Function Timer500
- Shortcut Control Instruction502
  - Rotary Table Shortest Direction Control502
- Ramp Signal Instruction505
  - Ramp Signal505
- Pulse Related Instruction507
  - Measuring the Density of 16 Bit Binary Pulses507
  - Measuring the Density of 32 Bit Binary Pulses511
  - 16 Bit Binary Pulse Output515
  - 32 Bit Binary Pulse Output523
  - 16 Bit Binary Pulse Width Modulation531
  - 32 Bit Binary Pulse Width Modulation535
- Drum Sequence540
  - 16-Bit Binary Data Absolute Method540
  - 32-Bit Binary Data Absolute Method542
  - Relative Method544
- Check Code546
- Data Operation Instruction549
  - Searching 16-Bit Data549
  - Searching 32-Bit Data551
  - Bit Check of 16-Bit Data553
  - Bit Check of 32-Bit Data554
  - Bit Judgment of 16-Bit Data555
  - Bit Judgment of 32-Bit Data556
  - Searching the Maximum Value of 16-Bit Data557
  - Searching the Maximum Value of 32-Bit Data558
  - Searching the Minimum Value of 16-Bit Data559
  - Searching the Minimum Value of 32-Bit Data560
  - Sorting 16-Bit Data561
  - 16-Bit Data Alignment 2564
  - 32-Bit Data Alignment 2567
  - Adding 16-Bit Data570
  - Adding 32-Bit Data571
  - Calculating the Mean Value of 16-Bit Data572
  - Calculating the Mean Value of 32-Bit Data573
  - Calculating the Square Root of 16-Bit Data574
  - Calculating the Square Root of 32-Bit Data575
  - CRC Calculation576
- Indirect Address Read Instruction579
  - Reading the Indirect Address579
- Clock Instruction581
  - Reading Clock Data581
  - Writing Clock Data583
  - Adding Clock Data585
  - Subtracting Clock Data587
  - Converting Time Data from Hour/Minute/Second to Seconds in 16 Bits589
  - Converting Time Data from Hour/Minute/Second to Seconds in 32 Bits590
  - Converting Time Data from Seconds to Hour/Minute/Second in 16 Bits591
  - Converting Time Data from Seconds to Hour/Minute/Second in 32 Bits592
  - Comparing Date Data593
  - Comparing Time Data596
  - Comparing Clock Data599
  - Comparing Clock Data Zones601
- Timing Check Instruction603
  - Generating Timing Pulses603
  - Hour Meter605
- Module Access Instruction607
  - I/O Refresh607
  - Reading 1-Word/2-Word Data from Another Module609
  - Writing 1-Word/2-Word Data to Another Module612
  - Reading 1-Word/2-Word Data from Another Module615
  - Writing 1-Word/2-Word Data to Another Module (32-Bit Specification)618
Chapter 8 Built-In Ethernet Function Instructions621
- Open/Close Processing Instructions621
  - Opening a Connection621
  - Closing a Connection624
- Socket Communications Function Instructions626
- Part 4 Module Dedicated Instruction635
Chapter 9 High-Speed Counter Instruction636
- High-Speed Processing Instruction636
- High-Speed Current Value Transfer Instruction646
  - High-Speed Current Value Transfer of 16-Bit Data646
  - High-Speed Current Value Transfer of 32-Bit Data648
Chapter 10 External Device I/O Instruction650
- Serial Communication 2650
Chapter 11 Positioning Instruction652
- Positioning Instruction652
Chapter 12 Inverter Communication Instruction677
- Inverter Operation Monitoring(Status Check)677
- Inverter Operations Control(Drive)678
- Inverter Parameter Read679
- Inverter Parameter Write680
- Inverter Parameter Block Write681
- Inverter Multi Command682
Chapter 13 Modbus Communication Instruction684
- MODBUS Read/Write684
Chapter 14 Divided Data Read/Write From/To Bfm Instruction686
- Divided BFM Read686
- Divided BFM Write689
- Part 5 Standard Functions691
Chapter 15 Type Conversion Functions692
- Converting BOOL to WORD692
- Converting BOOL to DWORD693
- Converting BOOL to INT694
- Converting BOOL to DINT695
- Converting BOOL to TIME696
- Converting BOOL to STRING697
- Converting WORD to BOOL698
- Converting WORD to DWORD699
- Converting WORD to INT700
- Converting WORD to DINT701
- Converting WORD to TIME702
- Converting DWORD to BOOL703
- Converting DWORD to WORD704
- Converting DWORD to INT706
- Converting DWORD to DINT708
- Converting DWORD to TIME709
- Converting INT to BOOL710
- Converting INT to WORD711
- Converting INT to DWORD712
- Converting INT to DINT713
- Converting INT to BCD714
- Converting INT to REAL716
- Converting INT to TIME717
- Converting INT to STRING718
- Converting DINT to BOOL720
- Converting DINT to WORD721
- Converting DINT to DWORD723
- Converting DINT to INT724
- Converting DINT to BCD725
- Converting DINT to REAL727
- Converting DINT to TIME728
- Converting DINT to STRING729
- Converting BCD to INT731
- Converting BCD to DINT733
- Converting REAL to INT735
- Converting REAL to DINT737
- Converting REAL to STRING739
- Converting TIME to BOOL742
- Converting TIME to WORD743
- Converting TIME to DWORD744
- Converting TIME to INT745
- Converting TIME to DINT746
- Converting TIME to STRING747
- Converting STRING to BOOL748
- Converting STRING to INT749
- Converting STRING to DINT751
- Converting STRING to REAL753
- Converting STRING to TIME756
- Converting Bit Array to INT757
- Converting Bit Array to DINT758
- Converting INT to Bit Array759
- Converting DINT to Bit Array760
- Bit Array Copy761
- Reading the Specified Bit of Word Label762
- Writing the Specified Bit of Word Label763
- Copying the Specified Bit of Word Label764
- Unnecessary of Type Conversion765
- Absolute Value766
Chapter 16 Single Number Variable Functions766
- Square Root768
- Natural Logarithm Operation769
- Calculating the Common Logarithm770
- Exponential Operation772
- Sine Operation773
- Cosine Operation774
- Tangent Operation775
- Arc Sine Operation776
- Arc Cosine Operation777
- Arc Tangent Operation778
- Addition779
Chapter 17 Arithmetic Operation Functions779
- Multiplication781
- Subtraction783
- Division785
- Remainder787
- Exponentiation789
- Move Operation791
Chapter 18 Bit Shift Functions793
- N-Bit Left Shift793
- N-Bit Right Shift795
- N-Bit Left Rotation797
- N-Bit Right Rotation799
- AND Operation, or Operation, XOR Operation801
Chapter 19 Standard Bitwise Boolean Functions801
- Logical Negation803
Chapter 20 Selection Functions804
- Selection804
- Selecting Maximum/Minimum Value806
- Limit Control808
- Multiplexer810
Chapter 21 Comparison Functions812
- Compare812
- Compare814
Chapter 22 Character String Functions816
- Character String Length Detection816
- Extracting Character String Data from the Left/Right817
- Extract MID String819
- Link Character Strings821
- Inserting Character String823
- Deleting Character String825
- Replacing Character String827
- Searching Character String830
- Addition832
Chapter 23 Time Data Functions832
- Subtraction834
- Multiplication836
- Division838
- Part 6 Function Blocks841
- Bistable Function Blocks (Set Priority)842
Chapter 24 Bistable Function Blocks842
- Bistable Function Blocks (Reset Priority)844
Chapter 25 Edge Detection Function Blocks846
- Rising Edge Detector846
- Falling Edge Detector848
Chapter 26 Counter Function Blocks850
- Up Counter850
- Down Counter852
- Counter Function Block854
Chapter 27 Timer Function Blocks856
- Timer Function Blocks856
- Appendices859
Appendix 1 Number of Instruction Steps859
- Instruction Index878
- Revisions884
- Warranty885
- Trademarks886

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