Foxboro FBM10 Input Interface Module

Ethernet Link Setup

Data communication between the FBM232 and field devices are through the RJ-45

connector located on the front of the FBM232 module. The RJ-45 connector of the

FBM232canbeconnected through hubs, or through Ethernet switches to the field

devices (refer to Ethernet Switches for Use with FBM232. page 12). Connection of

multiple devices to the FBM232 requires a hub or switch.

Configurator

Operations

The FDSI configurator sets up the FBM232 XML based port and device configuration

files. The port configurator allows for easy setup of the communication parameters for

each port (such as, Dynamic Host Configuration Protocol (DHCP), IP addresses). The

device configurator is not needed for all devices, but when needed it configures

device specific and point specific considerations (such as, scan rate, address of the

data to be transferred, and the amount of data to be transferred in one transaction).

The FBM232canaccess up to 64 devices to read or write data. From the Foxboro

DCScontrol station to which the FBM232 is connected, up to 2000 Distributed Control

Interface (DCI) data connections can be made to read or write data. Supported data

types are determined by the particular driver loaded on the FBM232. which converts

the data to the DCI data types listed below:

• Ananaloginput or output value (integer or IEEE single-precision floating point)

• Asingle digital input or output value

• Multiple (packed) digital input or output values (packed in groups of up to 32

digital points per connection).

Thus the FBM232 can access up to 2000 analog I/O values, or up to 64000 digital I/O

values, or a combination of digital and analog values up to the maximum capacity a

user allows within the sizing guidelines of the control processor. The frequency of

access to the FBM232 data by a control station can be as fast as 500 ms. The

performance depends on each device type and the layout of data in the device.

The FBM232collects the required data from the devices, performs the necessary

conversions, and then stores the converted data in its database for incorporation into

the Foxboro DCS plant management functions and operator displays. Data may also

be written out to the individual devices from the Foxboro DCS system.

Fieldbus Communications

The Fieldbus Communications Module (FCM100Et or FCM100E) or the Field Control

Processor (FCP270 or FCP280) interface the redundant 2 Mbps module Fieldbus

used by the FBMs. The FBM232 accepts communication from either path of the

redundant 2 Mbps module Fieldbus- should one path fail or be switched at the system

level, the module continues communication over the active path