Software for ethernet/ip networks, Connections over an ethernet/ip network, Double data rate (ddr) backplane communication – Rockwell Automation 1756-L6x_L7x ControlLogix System User Manual User Manual
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Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 5
Communication Networks
Software for EtherNet/IP Networks
lists software that is used with the EtherNet/IP networks and modules
.
Connections Over an EtherNet/IP Network
You indirectly determine the number of connections the controller uses by
configuring the controller to communicate with other devices in the system.
Connections are allocations of resources that provide more reliable
communication between devices as compared to unconnected messages.
All EtherNet/IP connections are unscheduled. The requested packet interval
(RPI) for I/O control or the program, such as a MSG instruction triggers an
unscheduled connection. Unscheduled messaging lets you send and receive data
when needed.
Double Data Rate (DDR) Backplane Communication
DDR communication can be achieved with the 1756-L7
x controller. The
following communication modules support DDR when used with the 1756-L7
x
controller. Minimum series are indicated as follows:
•
1756-EN2T/C
•
1756-EN2TR/B
•
1756-EN2TF/B
•
1756-EN2TXT/C
•
1756-EN3TR/A
•
1756-RM/B
DDR communication is achieved most efficiently when all modules in the
communication path are DDR modules, or, in other words, as one conversation
(connection) only between DDR modules.
DDR communication is achievable in a chassis with a mix of DDR and non-
DDR modules. The DDR communication occurs between the modules that
Table 14 - Software for Use with EtherNet/IP Networks
Software
Is used to
Required or Optional
Logix Designer application
• Configure ControlLogix projects.
• Define EtherNet/IP communication.
Required
RSLinx Classic or RSLinx®
Enterprise
• Configure communication devices.
• Provide diagnostics.
• Establish communication between devices.
Required
BOOTP/DHCP Utility
Assign IP addresses to devices on an EtherNet/IP network.
Optional
RSNetWorx™ for EtherNet/IP
• Configure EtherNet/IP devices by IP addresses and/or
host names.
• Provide bandwidth status.