Mitsubishi Electric MELSEC iQ-R Series User Manual page 636

Event Event
code type
00800 System
00904
00906
00907
00908
00909
0090A
37 EVENT LIST
634
37.2 Event List
Event Detected event
category
Warning Link-down
Socket
communication send
error
Alive check error
Divided message
receive timeout error
IP composition
timeout error
TCP-specified port
number error
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
1 2
Operation Communication
source speed and
information communication
mode

3
