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1 OVERVIEW
1.4 High-speed Instruction Processing
1.4
High-speed Instruction Processing
Subset processing
Subset processing can reduce the number of steps or speed up the instruction processing when the device and label
specified by each operand of an instruction satisfy the specified conditions.
Instruction symbols and the number of operands do not change whether subset processing is applicable or not.
Instructions that support subset processing
For the availability of subset processing for each instruction, refer to the following.
Page 2031 Number of Basic Steps and Availability of Subset Processing
Operand condition
The conditions that the operands need to satisfy to enable subset processing are shown.
■
When a device is specified in an operand
The following table lists the conditions that an operand which specifies a device needs to satisfy.
*1 Including the cases where bit numbers, digits, indirect addresses, or index-modified devices are specified
*2 True when U3En\G
, U3En\G
Zn, U3En\HG
, or U3En\HG
Zn is used in the CPU buffer memory access device of the host CPU
module.
*3 True when U3En\HG
or U3En\HG
Zn is used in the CPU buffer memory access device of another CPU module.
■
When the label assigned to a device is specified in an operand
The same conditions as those applicable when a device is specified in an operand apply.
■
When the label assigned to each label area is specified in an operand
When the label assigned to a label area or latch label area is specified in an operand, any instruction which supports subset
processing performs subset processing regardless of the data type of the operand. (Including the cases where bit numbers or
digits are specified.)
Data type of operand
Condition
Bit data
One of the following is satisfied.
• User device
• Host CPU specification of CPU buffer memory access device (excluding index modification to "U3En")
• Other CPU modules specification of fixed scan communication area of CPU buffer memory access device
• File register
• Local device
• Refresh data register
Signed 16-bit data
Unsigned 16-bit data
Signed 32-bit data
Unsigned 32-bit data
One of the following is satisfied.
• User device
• Host CPU specification of CPU buffer memory access device (excluding index modification to "U3En")
• Other CPU modules specification of fixed scan communication area of CPU buffer memory access device
• Index register
• File register
• Local device
• Refresh data register
• Constant (decimal, hexadecimal)
Single-precision real number
One of the following is satisfied.
• User device
• Host CPU specification of CPU buffer memory access device (excluding index modification to "U3En")
• Other CPU modules specification of fixed scan communication area of CPU buffer memory access device
• Index register
• File register
• Local device
• Refresh data register
• Constant (single-precision real number)
Содержание MELSEC iQ-R Series
Страница 1: ...MELSEC iQ R Programming Manual Instructions Standard Functions Function Blocks ...
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Страница 24: ...22 INDEX 2092 INSTRUCTION INDEX 2093 REVISIONS 2104 WARRANTY 2105 TRADEMARKS 2106 ...
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Страница 35: ...33 PART 1 PART 1 OVERVIEW This part consists of the following chapter 1 OVERVIEW ...
Страница 68: ...66 1 OVERVIEW 1 5 Precautions on Programming MEMO ...
Страница 204: ...202 5 SEQUENCE INSTRUCTIONS 5 3 Output Instructions Operation error There is no operation error ...
Страница 470: ...468 6 BASIC INSTRUCTIONS 6 6 Data Conversion Instructions Operation error There is no operation error ...
Страница 472: ...470 6 BASIC INSTRUCTIONS 6 6 Data Conversion Instructions Operation error There is no operation error ...
Страница 479: ...6 BASIC INSTRUCTIONS 6 6 Data Conversion Instructions 477 6 Operation error There is no operation error ...
Страница 504: ...502 6 BASIC INSTRUCTIONS 6 7 Data Transfer Instructions Operation error There is no operation error ...
Страница 518: ...516 6 BASIC INSTRUCTIONS 6 7 Data Transfer Instructions Operation error There is no operation error ...
Страница 520: ...518 6 BASIC INSTRUCTIONS 6 7 Data Transfer Instructions Operation error There is no operation error ...
Страница 754: ...752 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 756: ...754 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 758: ...756 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 760: ...758 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 895: ...7 APPLICATION INSTRUCTIONS 7 16 Ramp Signal Instruction 893 7 Operation error There is no operation error ...
Страница 917: ...7 APPLICATION INSTRUCTIONS 7 20 Data Processing Instructions 915 7 Operation error There is no operation error ...
Страница 919: ...7 APPLICATION INSTRUCTIONS 7 20 Data Processing Instructions 917 7 Operation error There is no operation error ...
Страница 1415: ...13 SFC PROGRAM INSTRUCTIONS 13 1 SFC Control Instructions 1413 13 Operation error There is no operation error ...
Страница 1448: ...1446 14 REDUNDANT SYSTEM INSTRUCTIONS 14 2 Disabling Enabling System Switching MEMO ...
Страница 1795: ...25 TYPE CONVERSION FUNCTIONS 25 1 Converting BOOL to WORD 1793 25 Operation error There is no operation error ...
Страница 1805: ...25 TYPE CONVERSION FUNCTIONS 25 10 Converting WORD to DINT 1803 25 Operation error There is no operation error ...
Страница 1819: ...25 TYPE CONVERSION FUNCTIONS 25 21 Converting INT to DWORD 1817 25 Operation error There is no operation error ...
Страница 1950: ...1948 32 STRING FUNCTIONS 32 2 Extracting String Data From the Left Right Operation error There is no operation error ...
Страница 1972: ...1970 33 TIME DATA TYPE FUNCTIONS 33 4 Division MEMO ...
Страница 2067: ...APPX Appendix 5 PID Control Program Examples 2065 A 252 Set PID control data for loop 2 ...
Страница 2082: ...2080 APPX Appendix 6 Process Control Program Examples 129 Set the default value of the loop tag ...
Страница 2093: ...APPX Appendix 7 List of Loop Tag Memory Areas Used by Process Control Instructions 2091 A MEMO ...
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