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Error
Error message
code
Specified station access is
406
out of 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 write-
411
protected. Check the
memory cassette.
Cannot read/write device
412
protected by keyword.
Remove keyword.
E71 specification is
420
ASCII.
E71 is set as read-only.
421
Clear setting.
Not communicating
422
between CPU and E71.
Confirm CPU error.
Action
1. Station numbers other than master/local station are
specified at the CC-Link connection (via G4).
2. A PLC CPU other than QCPU is accessed.
Confirm the station number of the project data.
• When monitoring the same network as the GOT
The GOT accesses the other networks with the MELSEC-
NET/H, MELSECNET/10 (PLC to PLC network), or CC-Link
IE Controller Network connection.Confirm the network
number of the project data so as not to access to other
networks.
• When monitoring other networks
Reconfigure the [Routing Information Setting] of GT
Designer3 or GT Designer2 or the [Routing parameters] of
GX Developer.
• When the GT15-75J71LP23-Z/GT15-75J71BR13-Z is used
These models cannot monitor other networks.
• Confirm Network No. of the project data, in order for not
accessing other networks.
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
2
E
PROM, 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)
20.3 ERROR MESSAGE AND SYSTEM ALARM
20.3.2 List of Error Message/System Alarm
17
Channel
No.
storage
18
19
20
20
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Table of Contents
Troubleshooting
