Operations

The FBM232 can access up to 64 devices to read or write data. From the Foxboro

DCS 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 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.