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485
Replacing User-serviceable Parts
Section 10-2
Note The minimum lifetime is the memory backup time at an ambient temperature
of 55
°
C. The typical lifetime is the memory backup time at an ambient temper-
ature of 25
°
C.
Low Battery Indications
The ERR/ALM indicator on the front of the CPU Unit will flash when the bat-
tery is nearly discharged.
When the ERR/ALM indicator flashes, connect the CX-Programmer to the
peripheral port and read the error messages. If a low battery message
appears on the CX-Programmer (see note 1) and the Battery Error Flag
(A402.04) is ON (see note 1), first check whether the battery is properly con-
nected to the CPU Unit. If the battery is properly connected, replace the bat-
tery as soon as possible.
Once a low-battery error has been detected, it will take 5 days before the bat-
tery fails assuming that power has been supplied at lease once a day (see
note 2). Battery failure and the resulting loss of data in RAM can be delayed
by ensuring that the CPU Unit power is not turned OFF until the battery has
been replaced.
Note
1.
The PLC Setup must be set to detect a low-battery error (Detect Low Bat-
tery). If this setting has not been made, the BATT LOW error message will
not appear on the CX-Programmer and the Battery Error Flag (A402.04)
will not go ON when the battery fails.
2.
The battery will discharge faster at higher temperatures, e.g., 4 days at
40
°
C and 2 days at 55
°
C.
Memory Backup Time
Ambient temperature
This graphic is for reference only.
5 yr
4 yr
3 yr
2 yr
1 yr
CP1H CPU Unit
25
°
C
40
°
C
55
°
C
ERR/ALM indicator
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...