10 -
4
10. OTHER FUNCTIONS
(d) Constant scan time error
If there is a low-speed execution type program when performing the constant
scan, the constant scan time may be shifted by the time shown below.
The low-speed execution type program is divided and performed within surplus
time. Therefore, if one constant scan ends while performing the instruction takes
long processing time, the constant scan is completed after finishing the
processing of the instruction during execution. The time extended to complete
the execution of the instruction is the constant scan error. For details of the
instruction processing time, refer to the QCPU (Q mode)/QnACPU Programming
Manual (Common Instructions).
(Error)
Maximum processing time
of one instruction in the
low-speed execution type
program
=
+
low-speed END processing time
Time taken to execute the END
processing for a low-speed
execution type program
Summary of Contents for Q2ACPU
Page 1: ......
Page 2: ......
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 ...
Page 569: ......
Page 570: ......