7 -
2
7.
AUTO REFRESH FUNCTION
POINT
(1) Since up to 8 master modules can be set for auto refresh by the parameter,
auto refresh is possible for up to 8 modules.
When 9 or more modules are desired, use the FROM/TO instruction in the
sequence program from the 9th module.
(2) Since auto refresh is not possible with send/received data for the separate
refresh I/O modules and for the remote terminal units No.1 to No.14, use them
by the FROM/TO instructions.
However, the remote terminal units shown below are subject of auto refresh in
the limited area:
AJ35PTF-R2 RS-232C interface module
AJ35PT-OPB-M1-S3 mount-type tool box
AJ35PT-OPB-P1-S3 portable type tool box
(3) For the master modules set up for auto refresh, since the QnACPU
automatically turns ON the link communication start signal Y(n+18) or
Y(n+28), it is not necessary to turn it on from the sequence program.
(4) Auto refresh of I/O data is performed by the batch after the QnACPU performs
the END instruction.
(Auto refresh processing is performed when the CPU module is in the RUN/
PAUSE/STEP-RUN status.)
(5) The master module may perform the processing while the link communication
start signal Y(n+18) or Y(n+28) is OFF depending on the remote terminal units
connected.
For instance, if the AJ35PTF-R2 RS-232C interface unit is used without
protocol, it is necessary to write parameters to the parameter area (buffer
memory address 860 to 929) while the link communication start signal is OFF.
Since the link communication start signal becomes ON after the CPU module
enters the RUN status and one scan is performed, write the parameters
during the first 1 scan.
(6) If the hardware error signal X(n+0)or X(n+20) or ROM error signal X(n+8)or
X(n+28) of a master module for which auto refresh has been set comes ON,
the QnACPU does not perform auto refresh processing.
(7) When making the settings, ensure that there is no duplication between
receive data refresh devices and send data refresh devices.
1 scan
Link communication
start signal
Y(n+28)
SM402
Set CPU module to RUN
OFF
ON
OFF
ON
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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