Rockwell Automation Publication 1756-UM001M-EN-P - February 2012 105
Communication Networks Chapter 5
Foundation Fieldbus
Communication
Foundation Fieldbus is an open interoperable fieldbus designed for process
control instrumentation. The fieldbus devices described in the table can be
connected to the ControlLogix controller via another network as shown in the
example below.
Foundation Fieldbus distributes and executes control in the device. The
Foundation Fieldbus linking device does the following:
• Bridges from an EtherNet/IP network to an H1 connection
• Accepts either HSE or EtherNet/IP messages and converts them to the H1
protocol
Figure 11 - Foundation Fieldbus Example
For more information about using the Foundation Fieldbus devices available
from Rockwell Automation, see these publications:
• Foundation Fieldbus Linking Device User Manual, publication
1757-UM010
• ControlNet Foundation Fieldbus Linking Device User Manual,
publication 1757-UM011
• RSFieldbus User Manual, publication RSBUS-UM001
Table 27 - Fieldbus Devices and Capabilities
Fieldbus Device Is used to
1757-FFLD • Bridge an EtherNet/IP network to Foundation Fieldbus.
• Connect via a low-speed serial (H1) and high-speed Ethernet (HSE) network
connections.
• Access devices directly via an OPC server.
1788-CN2FF • Connect via low-speed serial (H1) connections.
• Bridge a ControlNet network to a Foundation Fieldbus.
• Support redundant ControlNet media.
RSFieldbus™ Software
24V DC
Power
Supply
Power
Conditioner
Field Device Field Device
1757-FFLD Linking Device
ControlLogix Controller with a
1756-ENBT Module
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