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639
Troubleshooting
Section 12-2
Memory Errors
■
Reference Information
Probable cause
Possible remedy
Automatic transfer from the Memory Cassette
at startup failed because the required data is
not on the Memory Cassette.
Store the required data on the Memory Cas-
sette.
An error has occurred in memory. One or
more bits in A403 will turn ON to indicate
where the error has occurred. See below for
details.
• Memory Error Location
See below.
A403.00 is ON
A checksum error
has occurred in the
user program.
The power supply
was turned OFF
when backing up the
user program to
flash memory.
Transfer the user program again.
A403.04 is ON
A checksum error
has occurred in the
PLC Setup.
Transfer the PLC Setup again.
A403.07 is ON
A checksum error
has occurred in the
routing tables.
Transfer the routing tables again.
A403.09 is ON
The contents of a
Memory Cassette
could not be nor-
mally read to the
CPU Unit when
power was turned
ON.
Check to see if the files required for automatic
transfer at startup are present on the Memory
Cassette.
A403.10 is ON
There is a problem
with flash memory.
A hardware error has occurred in the CPU Unit.
Replace the CPU Unit.
A403.11 is ON
A checksum error
has occurred in IP
address table.
Transfer the IP address table again.
A403.12 is ON
A checksum error
has occurred in IP
router table.
Transfer the IP router table again.
Error flag
Memory Error Flag, A401.15
Error code (A400)
80F1
Error information
Memory Error Location, A403
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: ......