Mitsubishi Electric GT14 User Manual page 376

Error
Error message
code
Communication timeout.
402 Confirm communication pathway
or modules.
SIO status error.
403 Confirm communication pathway
or modules.
Specified station access is out of
406 range.
Confirm station no.
Accessed other network.
407
Change network setting.
Cannot perform operation
410 because of PLC run mode.
stop the PLC.
Memory cassette is
411 writeprotected.
Check the memory cassette.
Cannot read/write device
412 protected by keyword.
Remove keyword.
420 E71 specification is ASCII.
E71 is set as read-only.
421
Clear setting.
Not communicating between
422 CPU and E71. Confirm CPU
error.
20 - 16
20. TROUBLESHOOTING
20.2 Error Message and System Alarm
The time-out error occurred during communicating.
• Confirm the cable omission and status of the PLC.
Channel No. is not displayed in error code or error message in the
case an error occurs when using the multi-channel function.
Refer to the following manual to identify the channel No. in error.
• This error may occur when the load of the PLC CPU becomes heavier
when accessing other stations. In such a case, transfer the data of the
other stations to the host station PLC CPU and monitor them at the
host.
• Put COM instruction when the PLC scanning is long.
Either of the overrun error, parity bit error or flaming error was generated
when the RS-422 / RS-232 communication was received.
Confirm the cable omission, status of the PLC.and the transmission
speed of the computer link.
Channel No. is not displayed in error code or error message in the case
an error occurs when using the multi-channel function.
• Station numbers other than master/local station are specified at the
CC-Link connection (via G4).
• A PLC CPU other than QCPU is accessed.
• Confirm the station number of the project data.
• When monitoring other networks
Reconfigure the [Routing Information Setting] of GT Designer3 or the
[Routing parameters] of GX Developer.
The operation, which could not be performed during RUN of PLC CPU,
was performed.
Stop the PLC CPU.
The memory cassette installed in the PLC CPU is EPROM or E
and it is in a protected status.
Confirm the memory cassette installed in PLC CPU.
The key word is set in PLC CPU.
Cancel the key word.
[ASCII code] is selected in [Ethernet operations] of the PLC side setting.
Select [Binary code].
The Ethernet module on the PLC side is set in read-only.
Set the Ethernet module on the PLC side to write-enabled.
PLC CPU error. Communication between PLC CPU and the PLC side
Ethernet module impossible.
Confirm whether there is error in PLC CPU by GX Developer etc.
(Confirm buffer memory)
Action
Channel No.
storage
2
PROM,