Delta RMC151 User Manual
Page 478
RMC70/150 and RMCTools User Manual
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Initial Data
This entry is logged only if the Sync Register is used and the Ethernet I/O Logging
filter option for the Event Log is set to All. It is reported when the first incoming I/O
data is received after a new controlling I/O connection is established, showing both the
data and the value of the Sync In register. Notice that the data is not yet applied to
the RMC.
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Data Changed
This entry is logged only if the Sync Register is used and the Ethernet I/O Logging
filter option for the Event Log is set to All. It is reported when any Incoming I/O Data
register has changed, but the Sync In register has not. This entry shows both the data
and the value of the Sync In register. Notice that the data is not yet applied to the
RMC.
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Request Made
This entry is logged each time the incoming I/O data is applied to the RMC. If the Sync
Register is used, then this is each time the Sync In register changes. If the Sync
Register is not used, then this occurs when the I/O data is first received, and each
time after that when any register in the Incoming Data changes. This log entry will be
shown by default, but can be disabled by setting the Ethernet I/O Logging filter
option for the Event Log to None.
Using the Communications Statistics
To open the Communication Statistics window, in the Project pane, select the desired
controller. On the Controller menu, choose View Communication Statistics.
The Communications Statistics window provides information on open EtherNet/IP I/O
connections, such as the producing and consuming registers and the RPI, along with
information on timed-out connections. The statistics also provide advanced information on
the Ethernet traffic.
Rockwell Ethernet Module Error Code 0x0203
When using RMC70/150 firmware 3.41.0 or newer and Rockwell Automation Ethernet
modules with older firmware, communication problems may occur, resulting in the error
0x0203.
Cause
The RMC70/150 firmware release 3.41.0 introduced a number of enhancements to the
EtherNet/IP protocol, including support for the Quality-of-Service (QoS) object in
EtherNet/IP. This object allows managed Ethernet switchgear to prioritize EtherNet/IP
packets to provide even higher levels of determinism. The QoS object was defined by
OD to be backward compatible with devices that did not
support the QoS object.
However, unfortunately it has been found that some devices incorrectly handle the
default QoS object behavior of marking I/O data with non-zero DSCP values. In
particular, a number of Rockwell Automation Ethernet modules with older firmware
discard I/O packets that have been marked in this way, causing the EtherNet/IP I/O
connection to time out with error code 16#0203 shortly after it is established.
Rockwell Automation is aware of the problem, and has a knowledge base article that
discusses the issue (#63904 -
d suggests
that users update the firmware in their Ethernet modules to fix the issue. The following
firmware revisions fix the problem in the following Rockwell modules:
Rockwell
Module
Firmware Revision
1788-ENB 2.4.1
L2xE/L3xE V17
1756-ENBT 4.5.1
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