10.
10 -
2
OTHER FUNCTIONS
10.2 Constant Scan
(1) Constant scan
In the QnACPU, the scan time varies since the processing time differs depend on the
execution status of the instructions used in the sequence program.
Constant scan is a function whereby the sequence program is repeatedly performed
while maintaining constant scan time.
When the low-speed execution type program is used, either this constant scan function or
a low-speed program execution time has to be set.
(For details, refer to the QnACPU Programming Manual (Fundamentals).)
Scan time when the constant scan is not used
Scan time when the constant scan time is set to 70ms
Scan time when the constant scan time is set to 100ms while performing multiple programs
Fig. 10.1 Constant scan operation
Summary of Contents for Q2ACPU
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Page 221: ...12 12 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Page 222: ...12 13 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Page 237: ...12 28 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU MEMO ...
Page 271: ...16 13 16 POWER SUPPLY MODULE 4 Names and description of parts of the A66P ...
Page 343: ...21 21 13 MAINTENANCE AND INSPECTION 21 4 2 Replacement of the fuse for an output module ...
Page 357: ...22 12 22 TROUBLESHOOTING ...
Page 359: ...22 14 22 TROUBLESHOOTING MEMO ...
Page 429: ...App 32 APPENDICES Trigonometric function Classification Symbol Description ...
Page 537: ...App 140 APPENDICES REMARK 1 Message 1 An error code is displayed in 2 Alert 1 3 Alert 2 ...
Page 539: ...App 142 APPENDICES 2 Q2ACPU Q2ACPU S1 modules Unit mm inch ...
Page 541: ...App 144 APPENDICES 2 A66P power supply module Unit mm inch ...
Page 543: ...App 146 APPENDICES 3 A35B base unit 4 A38B A38HB A38HBEU base unit Unit mm inch Unit mm inch ...
Page 567: ...MEMO ...
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