21 -
5
21. MAINTENANCE AND INSPECTION
The battery life guideline and the replacement procedures are explained on the following
pages.
POINTS
The relationship of back up between the status of the batteries installed in the
CPU module and memory cards is explained below.
The following two points are applied.
1) The battery installed in the CPU module does not back up the RAM memories
of the memory cards.
2) The batteries installed in the memory cards do not back up the built-in RAM of
the CPU module.
AC power supply
for CPU module
CPU module battery
Memory card
battery
CPU module
memory
Memory card
memory
ON
ON
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
: Back up is possible.
: Back up is not possible.
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: ......