13-51
13 Troubleshooting
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
13-6 Troubleshooting
13
13-6-5 Message Timeout Problems
13-6-5 Message Timeout Problems
Timeout errors occur frequently in message ser-
vices (CIP UCMM, CIP Class 3, or FINS).
• When there is a high load in the tag data link, and the CPU Unit’s
task period is relatively long or there are messages coming in from
many nodes, the message service response time may be delayed
and messages may be discarded occasionally.
• In this case, the communications load must be reduced by increas-
ing (slowing) the tag data link’s RPI, reducing the message load, or
increasing the timeout value.
• The tag data link’s bandwidth usage can be checked on the Monitor
Device Window’s Ethernet Information Tab Page. Refer to 13-1
Checking Status with the Network Configurator for details.
• The error log error codes that indicate discarded messages (insuffi-
cient memory) due to heavy communications loads are 0117, 0119,
0123, 0125, 03C2 (detail code @@08, @@09, or @@0A), 03C3, and
03D2. Refer to 13-1 Checking Status with the Network Configurator
for details on reading the error codes on the Error History Tab Page.
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