643
Troubleshooting
Section 12-2
Note
Just as when a CPU error occurs, the RUN indicator will turn OFF and the
ERR/ALM indicator will light when a fatal error occurs. Connecting the CX-
Programmer, however, is possible for fatal errors but not for CPU errors. If the
CX-Programmer cannot be connected (online), a CPU error has probably
occurred.
12-2-5 Non-fatal Errors
A non-fatal error has occurred if both the RUN indicator and the ERR/ALM
indicator are lit during operation (i.e., in RUN or MONITOR mode).
■
CPU Unit Indicators
Information on the non-fatal error can be obtained from the Error Tab Page of
the CX-Programmer’s PLC Error Window. Take corrective actions after check-
ing error details using the display messages and the Auxiliary Area Error
Flags and error information.
• Errors are listed in the following table in order, with the most serious ones
first.
• If two or more errors occur at the same time, the most serious error code
will be stored in A400.
Errors Created with for FAL Instructions
A FAL instruction was executed in the program to create a non-fatal error.
■
Reference Information
Flash Memory Errors
POWER
Lit
RUN
Lit
ERR/ALM
Flashing
INH
---
BKUP
---
LNK/ACT
---
POWER
RUN
INH
LNK/ACT
BKUP
ERR/ALM
Probable cause
Possible remedy
The executed FAL number 001 to 511 will
be stored in A360 to A391. The number 4
will be added to the front of 101 to 2FF
(which correspond to executed FAL num-
bers 001 to 511) and the result will be
stored in A400 as error code 4101 to
42FF.
Check the conditions for executing FAL
instructions and remove any causes of
the user-defined error.
Error flag
FAL Error Flag, A402.15
Error code (A400)
4101 to 42FF
Error information
None
Probable cause
Possible remedy
A315.15 will turn ON when writing to the
internal flash memory fails.
Replace the CPU Unit when the internal
flash memory has been written to more
than 100,000 times.
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: ......