Rockwell Automation 1738-AENT, Series B ArmorPOINT I/O Dual Port EtherNet/IP Adapters User Manual - Manual (Page 84)

74 Rockwell Automation Publication 1738-UM005A-EN-P - July 2013
Chapter 5 Configure the Adapter for Direct Connection and Rack Optimization in RSLogix 5000 Software
An Overloaded
1738-AENT/B Adapter Each ArmorPOINT I/O connection established with the 1738-AENT/B
adapter will consume a portion of the microprocessor’s bandwidth. The amount
of bandwidth used by a connection depends on a number of variables, including
the RPI, the number of ArmorPOINT I/O modules involved in the connection,
and the rate of change of the I/O. The 1738-AENT/B adapter continuously
monitors this bandwidth and will reject requests for new connections when there
is insufficient bandwidth available to support the new connection.
The condition where the 1738-AENT/B adapter cannot support the connection
due to a limit of the microprocessor’s bandwidth is shown below.
If this condition is encountered, alter the existing connections to reduce the
amount of microprocessor bandwidth consumed. The most likely fixes for this
condition include:
• Increase the RPI
• Decrease the number of connections.