Mitsubishi Electric MELSEC Q80BD-J71GF11-T2, User Manual

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16 TROUBLESHOOTING
16.1 Error Examples
143
16
Network access
Error Description Reference
An error occurred in the
network data link. The communication error occurred.(ERR.LED is ON/Flashing.) Page 152 Communication error (ERR. LED is ON/
Flashing)
The user program cannot access CPU modules other than QCPU
(Q mode) and MELSEC iQ-R series CPU modules. Page 152 User program cannot access CPU modules
other than QCPU (Q mode) and MELSEC iQ-R series
CPU modules
The board cannot perform communication occasionally while
executing a user program. Page 153 Communication cannot be performed
occasionally when executing user program
Station is disconnected from the network unexpectedly.
• The connected station is disconnected unexpectedly.
• Data cannot be read from/written to the accessed station.
• Communication with the accessed station occasionally fails.
• A relevant station repeats network connection and
disconnection.
Page 153 Station is disconnected
Communication is unstable.
• The link scan time and transmission delay time is abnormally
longer.
• A timeout occurs during transient transmission.
Page 153 Communication is unstable
An error occurred while
accessing the device via a
network. The cyclic transmission cannot be performed.
• The output of the own station does not reach the accessed
station.
• The change of the input from the accessed station does not
reach the own station.
• An unexpected value is set to the link device.
Page 154 Cyclic transmission cannot be performed
The transient transmission cannot be performed.
• The data cannot be written to the accessed station.
• The data cannot be read from the accessed station.
• The data cannot be monitored with the utility.
• The data cannot be read/written while accessing to the device
using a communication function with a user program.
Page 155 Transient transmission cannot be performed