21.
21 -
6
MAINTENANCE AND INSPECTION
21.3.1 Battery life
(1) Battery life of CPU module
The CPU module battery life differs depending on the CPU model. The life for each
CPU model is shown in Table 21.3.
*
Actual value indicates a rough average value and guaranteed value indicates the minimum
value.
Table 21.3 CPU module battery life
CPU module model name
Battery life [hr]
Guaranteed value (MIN)
Actual value (TYP)
After SM51 is turned ON
Q2ACPU
1800
14500
48
Q2ACPU-S1
1150
10700
27
Q3ACPU
4000
18000
113
Q4ACPU
1750
6200
44
POINT
(1) Use the battery within the time shown by the guaranteed value of the battery
life.
(2) If the battery may be used exceeding the guaranteed time, perform the
following measures.
Perform ROM operation to protect a program in case that the battery dies at
PLC power supply OFF.
After SM51 (Battery low) turns ON, back up a program and data within the
specified time shown in the Table 21.3.
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: ......
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