Omron CJ1W-FLN22, Operation Manual, Page: 184 / 277

Troubleshooting Procedures Section 10-4
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10-4-7 Troubleshooting According to Response Codes
You can troubleshoot the errors in FL-net communications from the response
codes when the SEND(090), RECV(098), or CMND(490) instructions have
been used. For the storage areas of response codes for SEND(090),
RECV(098), and CMND(490) instructions, refer to
Communications Port
Completion Codes on page 101 in 7-2 Sending Commands from a PLC .
The table below lists response codes (main and sub-codes) returned for the
FL-net Unit. Refer to the relevant operation manuals for information on
response codes for the CPU Unit, other CPU Bus Units, or FA computers
using FINS communications.
The 6th, 7th, and 15th bits of the response codes have specific functions. The
15th bit will be ON when a network relay error has occurred. Refer to informa-
tion given after the following table for more information on relay errors. The 6th
bit or 7th bit will be ON when an error has occurred in the destination CPU
Unit. Remove the cause of the error at the destination CPU Unit, referring to
the operation manual for the CPU Unit. The meaning of the response codes
are shown below.
12 The regular communications of the entire system are affected by the pro-
cessing capacity of connected devices. Perform communications using the
communications processing speed for all devices connected to the network
that matches the communications processing capacity (minimum allowable
frame interval) of the slowest device. Therefore, the realtime performance
for the entire system may be greatly reduced by adding devices to the net-
work.
13 The header section of message data is big endian, but the data is little
endian. The system parameters in the data of transparent messages and
profile read data, however, is big endian. (Big endian data indicates a trans-
mission method that sends the MSB first).
No. Details
First byte
Second byte
Bit
Main response code (MRES)
Sub-response code (SRES)
1: PLC Non-fatal Error Flag
1: PLC Fatal Error Flag
1: Network Relay Error Flag
Main response
code
Sub-response code Check point Probable cause Remedy
Value Meaning Value Meaning
00 Normal
completion 00 --- --- --- ---
01 Local node
error 01 Local node
not in net-
work Local IP
address, node
number Message cannot be sent
because the node is not
participating in the net-
work. Correct the local IP address
and node number.
04 Reception
buffer over-
flow
(receiving
node) System load No available space n
internal buffer of receiv-
ing node. Correct the user application to
reduce the load (traffic) at the
FL-net Unit.
07 Local node
busy, can-
not send System load The internal buffers are
full because there is too
much traffic at the local
node, preventing data
from being sent. Correct the user application to
reduce the load (traffic) at the
FL-net Unit.