Allen-Bradley 1757-FFLD2, User Manual

Page: 28 / 184

28 Rockwell Automation Publication 1757-UM012A-EN-P - July 2011
Chapter 3 Create an RSFieldbus Software Project
Initiate a Fieldbus Project Figure 5 shows an example of a typical fieldbus system. The HSE protocol is
established during the initial download of the RSFieldbus software. Data is
transferred and stored to the workstation through the Ethernet or ControlNet
networks depending on your application requirements and the selected
linking device.
The 1757-FFLD linking device connects field devices on H1 segments to Logix
controllers by using an Ethernet transmission. The 1757-FFLDC bridges data
flow between H1 segments on the ControlNet network.
Figure 5 - Fieldbus System Example
You must have at least one power conditioner per power supply on the H1 line,
and two terminators; one each at opposite ends of the bus, as shown in
Figure 9.
Refer to the FOUNDATION Fieldbus Design Considerations Reference
Manual, publication
RSFBUS-RM001 , for additional system requirements.
Item Description Item Description
1 RSFieldbus workstation 4 Power conditioner
2 24V DC power supply 5 Field devices
3 Linking device - 1757-FFLD or 1757-FFLDC T Network terminator
STATUS
WDOG
BATT
NS 1
MODE
H1
H1
H1
H1
H1-1
H1-2
H1-3
H1-4
FOUNDATION Fieldbus
FOUNDATION Fieldbus
Linking Device
T T
HSE Protocol
(through ControlNet
or Ethernet)
1
2
4
3
5
2
H1 Network
43733