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10. OTHER FUNCTIONS
(2) Setting the constant scan time
(a) The setting is made in "PC RAS" in the parameter mode of GPP function.
• When performing the constant scan, set the constant scan time.
• When not performing the constant scan, leave the field blank.
Example: When setting 100ms to "Constant scan"
(b) Set constant scan time that is longer than the maximum scan time of the
sequence program. If the scan time of the sequence program is longer than the
set value for constant scan time, the QnACPU detects an error code (SD0 =
5010), and the sequence program is performed in the own scan time, ignoring
the constant scan time setting.
Make sure that the constant scan time setting is shorter than the set time for
WDT (Watchdog timer). If it is longer than the set time for WDT, the QnACPU
detects a WDT error and the program execution is stopped.
Set the constant scan time within the following range.
(c) Sequence program processing is suspended in the wait time between the END
processing of the sequence program and the start of the next scan.
However, if an interrupt factor occurs after the execution of END processing, or if
there is a low-speed execution type program, the interrupt program or the low-
speed execution type program is performed.
Setting time for WDT Setting time for constant scan Maximum scan time of sequence program
Fig. 10.2 Operation when scan time is longer than constant scan setting time
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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