12 -
14
12. OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU
(4) END processing
When all of the low-speed execution type program has been completed, low-speed
END processing is executed.
The following processing is performed in low-speed END processing:
• Setting of special relays/special registers for the low-speed execution type
program
• Writing the low-speed execution type program during RUN
• Measurement of the low-speed scan time
• Resetting the watchdog timer for the low-speed execution type program
When low-speed END processing is completed, the low-speed execution type
program is executed again from the beginning.
(5) Low-speed scan time
(a) The low-speed scan time is a total time of the time required for completion of the
low-speed execution program and the low-speed END processing time.
If multiple low-speed execution type programs are to be executed, it is the total
time of the time required for completion of all low-speed execution type
programs and the low speed END processing time.
(b) The QnACPU measures the low-speed scan time and stores it in special
registers SD528 to SD535.
*1
The low-speed execution scan time can be checked by monitoring these
registers.
Example:
If "3" and "400" are stored in SD528 and SD529 respectively, the scan time is
3.4ms.
*1
The accuracy of each scan time stored in the special registers is 0.1ms. Note that, even if a
watchdog timer (WDT) reset instruction is executed in the sequence program, measurement
of each scan time is continued.
POINT
In execution of a low-speed execution type program, the constant scan time may
be extended by a time equivalent to the maximum processing time for the
instructions executed plus the low-speed END processing time.
Содержание Q2ACPU
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Страница 237: ...12 28 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU MEMO ...
Страница 269: ...16 11 16 POWER SUPPLY MODULE 2 Names and description of parts of the A62P A62PEU and A65P module ...
Страница 271: ...16 13 16 POWER SUPPLY MODULE 4 Names and description of parts of the A66P ...
Страница 343: ...21 21 13 MAINTENANCE AND INSPECTION 21 4 2 Replacement of the fuse for an output module ...
Страница 357: ...22 12 22 TROUBLESHOOTING ...
Страница 359: ...22 14 22 TROUBLESHOOTING MEMO ...
Страница 417: ...App 20 APPENDICES 3 Shift instructions Classification Symbol Description n bit shift 1 bit shift 1 word shift ...
Страница 429: ...App 32 APPENDICES Trigonometric function Classification Symbol Description ...
Страница 432: ...App 35 APPENDICES 15 Clock instructions Classification Symbol Description Clock data read write ...
Страница 537: ...App 140 APPENDICES REMARK 1 Message 1 An error code is displayed in 2 Alert 1 3 Alert 2 ...
Страница 538: ...App 141 APPENDICES APPENDIX 6 EXTERNAL DIMENSIONS Appendix 6 1 CPU Module 1 Q3ACPU Q4ACPU modules Unit mm inch ...
Страница 539: ...App 142 APPENDICES 2 Q2ACPU Q2ACPU S1 modules Unit mm inch ...
Страница 541: ...App 144 APPENDICES 2 A66P power supply module Unit mm inch ...
Страница 542: ...App 145 APPENDICES Appendix 6 3 Main Base Unit 1 A32B base unit 2 A32B S1 base unit Unit mm inch Unit mm inch ...
Страница 543: ...App 146 APPENDICES 3 A35B base unit 4 A38B A38HB A38HBEU base unit Unit mm inch Unit mm inch ...
Страница 567: ...MEMO ...
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