432
Battery-free Operation
Section 8-5
b.
Select the Data Memory Option in the Backup to Flash Memory Area
and click the
Backup
Button.
The DM data will be written to the built-in flash memory.
Note
The DM data that is saved and written at startup is the entire DM Area (D0 to
D32767).
PLC Setup
1,2,3...
1.
Set Do not detect Low Battery (run without battery) to Do not detect.
2.
Set IOM Hold Bit Status at Startup and Forced Status Hold Bit Status at
Startup to Clear (OFF).
3.
Set Read DM from flash memory to Read. (Only when DM initial values
have been saved as described above.)
!Caution
The CP1L-EL/EM CPU Units automatically back up the user program and
parameter data to flash memory when these are written to the CPU Unit. Also,
the CX-Programmer can be used to save all of the data in the DM Area to the
flash memory for use as initial values when the power supply is turned ON.
Neither of these functions saves the I/O memory data (including HR Area
data, counter PVs and Completion Flags, and DM Area data other than initial
values). The HR Area data, counter PVs and Completion Flags, and DM Area
data other than initial values are held during power interruptions with a bat-
tery. If there is a battery error, the contents of these areas may not be accu-
rate after a power interruption. If HR Area data, counter PVs and Completion
Flags, and DM Area data other than initial values are used to control external
outputs, prevent inappropriate outputs from being made whenever the Battery
Error Flag (A402.04) is ON.
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......