Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 793

Event Event Event Detected event
code type category
00800 System Warning Link-down
00904 Socket
communication
send error
00906 Alive check error
00907 Divided message
receive timeout
error
00908 IP composition
timeout error
00909 TCP-specified port
number error
0090A UDP-specified port
number error
Description
■CPU module
The CPU module has entered into the
link-down state as a result of an operation
such as disconnecting a network cable
between the CPU module and an external
device.
■Redundant function module
The redundant function module has
entered into the communication disable
state as a result of any of the following:
• Any tracking cable was disconnected.
• The other system was powered off.
• An error occurred in the cable,
connector, or module.
Sending a message over socket
communication failed.
The alive status of an external device
could not be checked within the period
specified by the response monitoring
timer.
• All the data could not be received
within the period specified by the
response monitoring timer.
• Data of the total data length could not
be received.
• The remaining part of the message
divided into the TCP/IP level could not
be received within the period specified
by the response monitoring timer.
An IP composition timeout error occurred.
(The specified period of time expired
without receiving all of the divided data.)
A port number being used for opened
connection was set (for TCP/IP).
A port number being used for opened
connection was set (for UDP/IP).
Detailed information
Detailed Detailed
information 1 information 2
Operation Communication
source speed and
information communication
mode

Appendix 2 Event List
Detailed
information 3

A
APPX
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