Rockwell Automation 2711-K9A10_K9C10_T9A10_T9C10 DeviceNet Communications User Guide - Manual (Page 16)

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Publication 2711-6.0.4
Notes on using Explicit Client Messaging
• Devices must have a sufficient number of available connections
to support an Explicit Message connection by the PanelView and
any other connections required by the application. This includes
a Group 2 Only Slave owned by a Group 2 Only Client such as a
scanner that can proxy the UCMM service for the slave.
• Data read/written must be accessible as an externally addressed
DeviceNet attribute with the Get_Attribute_Single and
Set_Attribute_Single commands.
• Explicit-Client messaging is not designed for high speed
communications and uses lower priority messaging on
DeviceNet. Use I/O messaging for time critical applications.
• PanelBuilder Version 2.40 and later allows you to use an offset
for writing multiple words in each instance. The PanelView reads
or writes an entire Assembly Instance. The Packet Bytes and Bit
Offset in the tag address filter the requested information.
• The PanelView can access 128 unique Explicit-Client tags
(unique Node, Class, Instance, Attribute).
!
ATTENTION: Do not use the Explicit Client
messaging with critical control parameters or as an
alternative to a hard-wired emergency stop button
.