309
Indicator Error Displays Section 11-1
Serial Communications
Board Error Information
(A424)
For Serial Communications Boards, refer to the following Auxiliary Area word
(A424) as well as the indicator displays shown on the previous page. When an
error occurs, the corresponding flag is turned ON.
When a fatal error occurs, the ERR and ALM indicators on the CPU Unit will
light. When a non-fatal error occurs, the ERR and ALM indicators on the CPU
Unit will flash. Refer to the indicator error displays.
Note The ERR/ALM indicator will continue to flash even after the cause of a non-
fatal error has been removed for the Serial Communications Board. The indi-
cator can be stopped by clearing the error from a Programming Console or
Lit Not lit
A Protocol Data File (BACKUP
@@.PRM)
was read (restored) from the CPU Unit’s
Memory Card to the Board properly.
---
Flashing Flashing A protocol data write error has occurred or
protocol data has been destroyed.
There is no protocol data.
If the indicator status remains the same
when the protocol data is retransmitted,
replace the Board.
Transfer protocol data to the Board.
Flashing Flashing
The Protocol Data File (BACKUP
@@.PRM)
restore operation failed when restoring pro-
tocol data from the CPU Unit’s Memory
Card to the Board.
The Protocol Data Error Flag (bit A42409 in
CPU Unit’s Auxiliary Area) will be turned
ON if the restore operation fails.
Write (backup) the protocol data from the
Board to the Memory Card again and then
execute the restore operation again.
If the restore operation fails two times in
succession, use CX-Protocol to transfer the
protocol data to the Board.
Indicators Possible cause Remedy
RDY ERR/ALM
CPU Unit
Bit Flag Possible cause Remedy
00 Fatal
error
Inner Board
WDT error
The Board is faulty. Firmly secure the Board to the CPU Unit. If the
error persists when the Board is mounted to
another CPU Unit, replace the Board.
01 Inner Bus error A bus error has occurred. Firmly secure the Board to the CPU Unit. If the
error persists when the Board is mounted to
another CPU Unit, replace the Board.
04 Non-
fatal
error
Inner Board ser-
vice failure
The TXD(236)/RXD(235)
instruction was sent using no-
protocol mode to a Board that
does not support no-protocol
communications (pre-Ver.1.2).
Install a Board with Unit Ver. 1.2 or later and then
execute the TXD(236)/RXD(235) instruction.
05 Cyclic monitor-
ing error
The Inner Bus access right
cannot be retained for more
than the specified time.
CPU Unit and system load is too high. Review the
application.
07 Routing table
error
The routing tables are not set
correctly.
Correct the routing tables and retransfer them.
08 System setting
error
A system setting error has
occurred.
Correct the Setup Area settings, cycle the power
supply, restart the Board, or restart the port, or
execute STUP(237).
09 Protocol data
error
A protocol data checksum
error has occurred.
If the error persists when protocol data is retrans-
mitted, replace the Board.
10 Protocol macro
execution error
A syntax error has occurred
during protocol macro execu-
tion.
Correct the protocol data and retransfer it.
Try executing a correct sequence for the serial
port where the error is occurring or switch the
CPU Unit to PROGRAM mode and remove the
cause of the error.
11 Error Log data
error
The service life of the
EEPROM has expired.
If this error persists even if the power supply is
cycled, replace the Board.
To Next Page
Loading...
Need help?
General
