12 -
25
12. OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU
(5) Operation processing of QnACPU when RUN/STOP key switch is operated
RUN/STOP state
QnACPU Operation Processing
Operation processing of
sequence program
External output
Data memory
Remark
M, L, S, T, C, D
Y
RUN
STOP
Executes up to the END
instruction, then stops.
OS saves the output
status, and sets all the
output points to OFF.
Retains the condition
immediately before
entering the STOP
status.
OS saves the output
status, and sets all the
output points to OFF.
STOP
RUN
Starts from step 0.
Depends on the
output mode set by
the parameter for
STOP
RUN.
Starts operations from
the condition
immediately before
entering the STOP
status.
Depends on the
output mode set by
the parameter for
STOP
RUN.
POINT
The QnACPU executes the following processing in any of RUN state, STOP state,
or PAUSE status.
• Refresh processing of I/O modules
• Data communication with peripheral devices, computer link modules, and/or
serial communication modules.
• Link refresh processing.
Thus, even in the STOP state or PAUSE state, I/O monitoring and test operations
using a peripheral device, reading/writing from computer link modules or serial
communication modules, and communication with other stations via MELSECNET
can be performed.
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: ......