ABB Advant Fieldbus 100

Advant Fieldbus 100 (AF 100) is a high performance fieldbus, which is used for:

•Communication between Advant Controllers

•Communication between Advant Controllers and S800 I/O Stations, AC 800M controllers, AC 100 OPC Server, and the equipments developed and sold by other ABB companies.

In an AF 100 bus, it is possible to reach up to 80 stations within a total physical

distance of up to 13300 meters (43300 feet).

Advant Fieldbus supports three transmission media:

•Twisted pair (Twp)

•Coaxial (RG59 and RG11)

•Optical media.

An AF 100 bus can be built up with all the three media, where a part of one kind of

media is a specific segment.

The following rules apply to the segments:

•To each twisted pair segment, 32 stations can be connected, and the maximum segment length is 750 meters (2500 feet)

•The coaxial segment can be:

–300 meters (1000 feet) with cable RG59 or

–700 meters (2300 feet) with cable RG11.

•The optical media is only used in point-to-point communication, and it allows the total length of a bus segment to be up to 1700 meters (5500 feet).

•If back-to-back coupled optical segments are used, it is possible to reach up to a physical length of 13300 meters (43300 feet).

An Advant Fieldbus 100 may be installed with one or two physical bus lines (single

or redundant media). Two bus lines are chosen when increased availability is

required. The redundant bus line does not enhance the bus bandwidth when both the

bus cables are operating.

Advant Fieldbus 100 Redundancy Concept

The Advant Fieldbus 100 redundancy concept contains:

•Media redundancy

•Communication interface redundancy

•S800 I/O Field Communication Interface redundancy. When redundant media is used, redundancy must be maintained through the whole

bus (this comprises of the bus lines as well as connections of the stations to the bus).

Communication Interface Redundancy

Communication interface redundancy is achieved by using a pair of CI522s, CI630s,

CI631s, CI869s or CI820s, connected to a media redundant bus. Communication

interface redundancy is available for Advant Controller 400 Series, Advant

Controller 160, AC 800M controller, and S800 I/O stations.

Two communication interfaces (CIs) can operate as a pair, where one is Primary and

the other is Backup in the controller configuration.

Functions of Primary CI

In a redundant configuration, the address of the primary CI is the configured station

address on the bus.

The primary CI:

•Sends all output CDPs.

•Receives all input CDPs.

•Sends the time synchronization message if the station is configured as time synchronization master.

•Handles the normal Service Data communication for the station.

•Supervises that the backup can send on the bus. This is done at a low frequency using the service data protocol.

•Must be configured as bus master if the module is CI522/CI630 or CI631, so that the bus master responsibilities are performed.

Functions of Backup CI

In a redundant configuration, the address of the backup CI on the bus is the

configured station address + 80.

The backup CI:

•Supervises that the primary CI sends its output CDPs properly.

•Sends signal to the controller if the primary CI does not send its output CDPs.

•Receives all input CDPs.

•Responds to Service Data communication with the Primary.

•Must be configured as bus master if the module is CI522, CI630 or CI631. If the station number is less than or equal to 47, the backup module performs the bus master responsibilities, otherwise it does not.

Communication Interface Redundancy in Advant Controller 400 Series

To connect the CI522 redundant communication interfaces to a twisted pair bus, two

TC516 modems (or four TC512 modems) are used..

To connect the CI522 redundant communication interfaces to a coaxial cable bus,

four TC625 modems are required.

The TC516 modem has two connections, one for each redundant CI522 and a

connection to one twisted pair bus cable. TC516 can be used for two redundant

CI522s as well as for one single CI520V1/CI522/CI526V1.