FOXBORO P0916JW

Description

FOXBORO P0916JW
I/O DRIVERS
This FBM is a generic Ethernet hardware module in
which different software drivers can be loaded. These
drivers configure the FBM to recognize a particular
protocol used by the device. Several of the software
drivers are standard product offerings. Other custom
drivers can be developed to meet specific needs.
These drivers are dynamically downloaded to the
FBM232 with software code specifically designed to
interface with the third party device’s protocol. The
configuration procedures and the software
requirements for each driver are unique to the
device(s) being integrated into the system.
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 FBM232 can be connected through
hubs, or through Ethernet switches to the field
devices (refer to “ETHERNET SWITCHES FOR USE
WITH FBM232” on page 8). Connection of multiple
devices to the FBM232 requires a hub or switch.
CONFIGURATOR
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).
OPERATIONS
The FBM232 can access up to 64 devices to read or
write data. From the Foxboro Evo control 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:
 An analog input or output value (integer or IEEE
single-precision floating point)
 A single digital input or output value
 Multiple (packed) digital input or output values
(packed in groups of up to 32 digital points per
connection).
Thus a Foxboro Evo control station 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
using the FBM232. The frequency of access to the
FBM232 data by a control station can be as fast as
500 ms. The performance is dependant on each
device type and the layout of data in the device.
The FBM232 collects the required data from the
devices, performs the necessary conversions, and
then stores the converted data in its database for
incorporation into the Foxboro Evo plant
management functions and operator displays. Data
may also be written out to the individual devices from
the Foxboro Evo system.
FIELDBUS COMMUNICATION
The Fieldbus Communications Module (FCM100Et or
FCM100E) or the Field Control Processor (FCP270 or
FCP280) interface the redundant 2 Mbps module
Filedbus 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.