User manual

Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 99
Communication Networks Chapter 5
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 HSE or EtherNet/IP messages and converts them to the H1
protocol
Figure 15 - Foundation Fieldbus Example
For more information about using the Foundation Fieldbus devices available
from Rockwell Automation, see these publications:
• EtherNet/IP and ControlNet to FOUNDATION Fieldbus Linking
Device User Manual, publication 1788-UM057
• FOUNDATION Fieldbus Design Considerations Reference Manual,
publication PROCES-RM005
HART Communication
HART (Highway Addressable Remote Transducer) is an open protocol that is
designed for process control instrumentation.
RSFieldbus™ Software
24V DC
Power
Supply
Power
Conditioner
Field Device Field Device
1788-EN2FFR Linking Device
• ControlLogix
• 1756-ENBT
Device Is used to
1756 analog HART I/O modules: • Act as HART master to allow communication with HART field devices.
• Interface directly with field devices (through built-in HART modems), which
eliminates the need for external hardware and more wiring.
• Provide access to more field device data, including voltage and current
measurements.
• Directly connect asset management software to HART devices.
• Support differential wiring for environments where improved noise immunity is
needed (input modules).
ProSoft interface
MVI56-HART
• Acquire data or control application with slow update requirements, such as a
tank farm.
• Does not require external hardware to access HART signal.
• Does not provide a direct connection to asset management software.