Publication 20D-UM002C-EN-P - November 2003
2-18 What Is DriveLogix?
Remote connections depend on the communication card. Use the following
table to tally remote connections:
After calculating the number of remote connections, make sure they do not
exceed the limitations of the communication card:
• each ControlNet communication card supports 32 total connections, 9
of which can be scheduled (such as direct I/O connections and
produced and consumed tags)
• the Ethernet/IP communication card supports 32 total connections of
any type
Even if the total number of connections is within the card limitations, the total
number of messages per second must also be within the card limitations. You
can estimate the number of messages per second for a connection as (2 * 1000
ms) / RPI.
The communication cards support:
• each ControlNet communication card supports 1490 messages/second
• the EtherNet/IP communication card supports 4000 messages/second
Connection Type: Device
Quantity:
Connections
per Device:
Total
Connections:
remote ControlNet communication device (such as a 1794-ACN15,
-ACNR15 or 1756-CNB, -CNBR module) configured as:
direct (none) connection or rack-optimized connection
listen-only rack-optimization (1756-CNB, -CNBR only)
0 or 1
1
remote I/O device over ControlNet (direct connection) 1
remote EtherNet/IP communication device (such as a 1794-AEN
adapter or 1756-ENBT module) configured as:
direct (none) connection or rack-optimized connection
listen-only rack-optimization (1756-ENBT only)
0 or 1
1
remote I/O device over EtherNet/IP (direct connection) 1
produced and consumed tag
produced tag and one consumer
each additional consumer
1
1
consumed tag 1
maximum active message 1
total
