634
Error Classification and Confirmation
Section 12-1
12-1 Error Classification and Confirmation
Error Categories
Errors in CP1L-EL/EM CPU Units can be broadly divided into the following
four categories.
Confirming Errors
There are two sources of information on errors that have occurred.
• CPU Unit indicators
• Auxiliary Area
CPU Unit Indicators
These indicators show the operating status of the CPU Unit.
Note
Do not turn OFF the CPU Unit power supply when this indicator is lit.
Category
Comments
CPU Error
A WDT (watchdog timer) error is generated in the CPU Unit, the
CPU Unit will malfunction, and operation will stop.
CPU Standby
The CPU will go on standby because conditions for stating oper-
ation have not yet been met.
Fatal Error
Operation cannot continue. Operation will stop due to a serious
problem.
Non-fatal Error
A minor problem has occurred. Operation will continue
POWER
RUN
INH
LNK/ACT
BKUP
ERR/ALM
POWER
(green)
Lit
Power is ON.
Not lit
Power is OFF.
RUN (green)
Lit
The CPU Unit is executing a program in either RUN or
MONITOR mode.
Not lit
Operation is stopped in PROGRAM mode or due to a
fatal error.
ERR/ALM
(red)
Lit
A fatal error or CPU error (WDT error) has occurred.
operation will stop and all outputs will be turned OFF.
Flashing
A non-fatal error has occurred. Operation will continue.
Not lit
Operation is normal.
INH (orange)
Lit
The Output OFF Bit (A500.15) was turned ON. All out-
puts will be turned OFF.
Not lit
Operation is normal.
LNK/ACT
(orange)
Lit
A valid link is detected.
Flashing
Communications (either sending or receiving) are in
progress through the Ethernet port.
Not lit
Other than the above.
BKUP
(orange)
(See note.)
Lit
• The user program, parameters, or DM Area
data is being written to or accessed in the
built-in flash memory (backup memory).
• The user program, parameters, DM Area data,
or DM initial values are being written to or
accessed in a Memory Cassette.
• The BKUP indicator also lights while the user
program is being restored when the power
supply is turned ON.
Not lit
Other than the above.
Содержание CP1L-EL20DR-D
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Страница 22: ...xxii...
Страница 34: ...xxxiv Software Licenses and Copyrights 7...
Страница 178: ...144 Connecting the CX Programmer Section 5 1 Click the Connect button to connect and then connection online is completed...
Страница 192: ...158 Trial Operation and Debugging Section 5 3...
Страница 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Страница 666: ...632 Trouble Shooting Section 11 7...
Страница 696: ...662 Standard Models Appendix A...
Страница 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Страница 836: ...802 PLC Setup Appendix G...
Страница 838: ...804 TCP Status Transitions Appendix H...
Страница 840: ...806 Ethernet Network Parameters Appendix I...
Страница 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Страница 844: ...810 Ethernet Specifications Appendix K...
Страница 851: ...Index 817 work words 118 write protection 447...
Страница 852: ...818 Index...
Страница 854: ...820 Revision History...
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