Rockwell Automation 1756-L55M12, Selection Manual, Page: 42 / 88

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1756-SG001G-EN-P — March 2004
Foundation
Fieldbus Network
Foundation Fieldbus™ is a communications network created by the Fieldbus
Foundation. It is a protocol designed for robust, distributed control of process control
applications. Devices connected by a Foundation Fieldbus network can be used for
sophisticated, highly-distributed process control.
Serial Network The serial port is compatible with RS-232 serial communication. The serial port
supports the DF1 protocol to communicate with other devices on the serial link. You
can select:
Use this DF1 mode: For:
point to point communication between a controller and other DF1-compatible devices using DF1 full-duplex protocol
DF1 master
control of polling and message transmission between the master and each slave using DF1 half-duplex
polled protocol
DF1 slave using the controller as a slave station in a master/slave serial network using DF1 half-duplex protocol
user mode (ASCII) communication between a controller and an ASCII device, such as a bar code reader
Select the appropriate Foundation Fieldbus interface:
If your application bridges
to Foundation Fieldbus
from:
Select this interface: Description:
ControlNet 1788-CN2FF
The 1788-CN2FF linking device adds Foundation Fieldbus support to your ControlLogix system.
You can have one linking device per ControlNet tap. The device connects to two, independent
Fieldbus H1 networks.
EtherNet/IP 1757-FFLD
The 1756-FFLD linking device bridges from Ethernet to H1. It accepts either HSE or
EtherNet/IP messages and converts them to the H1 protocol. By supporting H1, HSE and
EtherNet/IP protocols, the 1756-FFLD is capable of providing bridging capability of Rockwell
Automation products and Foundation Fieldbus products on Ethernet to products on H1 links.
Cat. No.
1788-CN2FF
1757-FFLD2
1757-FFLD4
Certifications: UL, CSA (Class I, Division 2, Group A, B, C, D), CE, FM, C-Tick
Communication Rate
2 ms over ControlNet
31.25 Kbps over Fieldbus
10/100 Mbps over EtherNet/IP
31.25 Kbps over Fieldbus
Connections
two H1 networks
two H1 networks
four H1 networks
Backplane Current (mA) at 24V
270 mA
300 mA
300 mA
1757-FFLD example configuration 1788-CN2FF example configuration
STATUS
WDO G
B AT T NS 1
MODE
H1
H1
H1
H1
H1-1 H1-2
H1-3
H1-4
FOUN DATION F ieldbus
FOUN DATION F ieldbus L inking Device