Filter
Top Products
212
Troubleshooting with the DeviceNet Unit Indicators Section 9-1
Correction
Clear the scan list and register the scan list again or use the Configurator to
reset the master scan list.
Memory Access Error
Likely Cause
An error occurred in the Unit’s non-volatile memory itself. This error will occur
in the following cases.
1,2,3... 1. An error occurs reading the identity information during initialization
2. All 64 error log records cannot be used during initialization or registering
an error log record
3. An error occurs while reading or writing the error log
4. An error occurs while reading or writing the master function enabling data
or the master scan list
5. An error occurs while reading or writing the slave function enabling data or
the slave scan list
6. An error occurs while reading or writing the message monitoring timer
7. An error occurs while reading or writing the communications cycle time set
value
8. An error occurs while reading the identity information during Identity object
server processing
Note This error does occur for checksum errors while reading data.
DeviceNet Unit Response
Registers an error record with error code 0602 in the RAM error log area.
For error 1:
Normal operation continues
For error 2 or 3:
Remaining writes to EEPROM are all ignored. Other than that, normal opera-
tion continues. (Error records continue to be written to RAM.)
For error 4:
The master remote I/O communications are stopped. Other operations con-
tinue.
For error 5:
The slave scanning is stopped and other operations continue.
For error 6:
The default values are used for the message monitoring timer and operation
continues.
For error 7:
The communications cycle time is set automatically and operation continues.
For error 8:
Operation continues.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 00 (the Incorrect Switch Settings/EEPROM Error
Flag) will be ON.
7-segment MS indicator NS indicator Error log (Hex)
E9 Red (flashing) --- 0602