SIO status error. Confirm
communication pathway or modules.
Response does not match
Specified station access is out of
range. Confirm station no.
Accessed other network. Change
Cannot perform operation because
of PLC run mode. stop the PLC.
Memory cassette is write-protected.
Check the memory cassette.
Cannot read/write device protected
by keyword. Remove keyword.
Unsupported CPU has been
E71 specification is ASCII.
E71 is set as read-only. Clear setting.
Not communicating between CPU
and E71. Confirm CPU error.
Insufficient network table information.
Add station no.
8 - 8
8.2 Error Codes and System Alarm List
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, the communication module mounting status, 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.
Refer to the following manual to identify the channel No. in error.
• Resolve crosstalk on the line.
• Lengthen the communication timeout time.
• 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 the same network as the GOT
The GOT accesses the other networks with the MELSECNET/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 the [Routing
Information Setting] of GX Developer.
• When using GT15-75J71LP23-Z/ GT15-75J71BR13-Z
Other networks cannot be monitored.
Confirm the network number of the project data so as not to access to other
The operation, which could not be performed during RUN of PLC CPU, was
Stop the PLC CPU.
The memory cassette installed in the PLC CPU is EPROM or E2PROM, 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.
• Check the latest manual to see if the CPU is supported.
• Write package data created with the latest version of GT Designer3.
[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
Confirm whether there is error in PLC CPU by GX Developer etc. (Confirm buffer
The station number set in the project data and the station number set in the
switching station No. device do not exist in the Ethernet setting of GT Designer3.
• Add the station number set in the project data to the Ethernet setting of GT
• When using the station No. switching function, check the data of the switching
station No. device.
When the station number specified in the switching station No. device is not set
in the Ethernet setting, add the station number to the Ethernet setting.
When the station number does not exist in the system, change the data of the
switching station No. device.
(Set the station number so that it becomes the same as the station number of
the PLC side Ethernet module set in the parameter setting of GX Developer.)
GOT2000 Series Connection Manual for GT Works3 and a controller used
(1.6 Checking for Normal Monitoring)