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APPENDICES
APPENDIX 9 QnACPU PROCESSING TIME
QnACPU processing time is explained below.
Appendix 9.1
Overview of QnACPU Scan Time
The QnACPU scan time comes to the total of the following values.
• I/O refresh processing
• Total values of instruction execution time
• END processing
(1) I/O refresh time
(a) I/O data refresh time between the following modules, which is mounted in the
QnACPU main base unit and extension base unit, and CPU modules
• Input module
• Output module
• Special function module
(b) I/O refresh time can be calculated in the following formula.
(I/O refresh time) = (I/O points 16) N1 + (Output points 16) N2
For N1 and N2, refer to the following table.
(2) Instruction execution time
(a) Processing time of each instruction used for QnACPU program
For the processing time of each instruction, refer to the following manual.
• QCPU (Q mode)/QnACPU Programming Manual (Common Instructions)
(b) Since interrupt/fixed-cycle execution type program have overhead time, add the
overhead time to the instruction execution time.
(3) END processing
(a) QnACPU common processing time except for above (1), (2)
(b) The following table shows values of the END processing time.
CPU Module
N1
N2
Q2ACPU(S1)
5.2 s
5.0 s
Q3ACPU
4.8 s
4.7 s
Q4ACPU
4.4 s
4.3 s
CPU Module
END Proc Time
With error check (SM1084 = OFF)
Q2ACPU
1.7ms
Q3ACPU
1.3ms
Q4ACPU
0.7ms
Without error check (SM1084 = ON)
Q2ACPU
1.2ms
Q3ACPU
0.9ms
Q4ACPU
0.5ms
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 ...
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