21.
21 -
14
MAINTENANCE AND INSPECTION
21.5 When Reoperating a PLC After Storing it with a Battery Unconnected
When reoperating after a battery is uncounted and the PLC is stored, the memory
contents of a CPU module and memory card may be undefined.
Therefore, when resuming the operation, clear the CPU module memory and format the
memory in the CPU module by peripheral device.
Afeter doing so, write the memory contents backed up before saving to each memory.
The relationship between the backed-up memory and the batteries is explained below.
:
Battery is backed up.
: Battey is not backed up.
*As for device memory, also clear the latch range.
Before resuming the operation, clear/format the memory for which a battery is backed up
in the table above with a peripheral device.
For memory clear/format operations, refer to the following manuals.
• Type SW
IVD-GPPQ GPP Software package Operating Manual (Online)
• GX Developer Operating Manual
Memory
Battery
A6BAT installed in a CPU module
Battery incorporates a memory card
CPU module
Built-in RAM
Device*
Memory card
SRAM type
SRAM + E
2
PROM
type
SRAM
E
2
PROM
– (Battery back up is not required.)
POINT
(1) Make sure to back up each memory contents before storing the PLC.
When a PLC power supply is ON or CPU module reset is cancelled, a CPU
module reviews the status of data below, and initializes all the data if detecting
an error.
RAM data in built-in RAM
Breakdown history
Latch data (Latch relay (L), latch setting range device set in a parameter),
special relay SM900 to SM999, special register SD900 to SD999)
Sampling trace data
Содержание Q2ACPU
Страница 1: ......
Страница 2: ......
Страница 221: ...12 12 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Страница 222: ...12 13 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Страница 237: ...12 28 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU MEMO ...
Страница 269: ...16 11 16 POWER SUPPLY MODULE 2 Names and description of parts of the A62P A62PEU and A65P module ...
Страница 271: ...16 13 16 POWER SUPPLY MODULE 4 Names and description of parts of the A66P ...
Страница 343: ...21 21 13 MAINTENANCE AND INSPECTION 21 4 2 Replacement of the fuse for an output module ...
Страница 357: ...22 12 22 TROUBLESHOOTING ...
Страница 359: ...22 14 22 TROUBLESHOOTING MEMO ...
Страница 417: ...App 20 APPENDICES 3 Shift instructions Classification Symbol Description n bit shift 1 bit shift 1 word shift ...
Страница 429: ...App 32 APPENDICES Trigonometric function Classification Symbol Description ...
Страница 432: ...App 35 APPENDICES 15 Clock instructions Classification Symbol Description Clock data read write ...
Страница 537: ...App 140 APPENDICES REMARK 1 Message 1 An error code is displayed in 2 Alert 1 3 Alert 2 ...
Страница 538: ...App 141 APPENDICES APPENDIX 6 EXTERNAL DIMENSIONS Appendix 6 1 CPU Module 1 Q3ACPU Q4ACPU modules Unit mm inch ...
Страница 539: ...App 142 APPENDICES 2 Q2ACPU Q2ACPU S1 modules Unit mm inch ...
Страница 541: ...App 144 APPENDICES 2 A66P power supply module Unit mm inch ...
Страница 542: ...App 145 APPENDICES Appendix 6 3 Main Base Unit 1 A32B base unit 2 A32B S1 base unit Unit mm inch Unit mm inch ...
Страница 543: ...App 146 APPENDICES 3 A35B base unit 4 A38B A38HB A38HBEU base unit Unit mm inch Unit mm inch ...
Страница 567: ...MEMO ...
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