FOXBORO FCP280 RH924UQ

Description

FOXBORO FCP280 RH924UQ
At the beginning of block processing, I/O data is read
from each Fieldbus Module, for both input and
output channels. Data is read at the ECB scan period
specified for that module. However, data cannot be
read faster than the BPC. At the end of block
processing, process outputs are written to each of
the Fieldbus Modules.
Station Block
Each control processor contains a station block
automatically created to provide global data on
control processor system functions. The station
block contains information such as:
 Continuous block processing load
 Total CP load
 Basic processing cycles and CP overruns
 Number of bytes of dynamic free memory
 Number of peer-to-peer connections
 Sequence processing load
 I/O scan load
 OM scan load
 Idle time
 Station alarm groups
 Configuration security option.
Previous CPs only supported one I/O channel to an
HDLC fieldbus (which provides communication to a
chain of Fieldbus Modules) directly, or used external
hardware, such as the FEM100 (discussed in
PSS 21H-2Y14 B4) to support up to four I/O
channels. However, the FCP280 supports four I/O
channels directly, without the use of such external
hardware.
Every HDLC fieldbus’ channel requires a software
driver in the CP called a Primary ECB. Thus, the
FCP280’s Compound has four Primary ECBs – one
for each channel – through which the station block
directs all communications. Each of its FBM’s ECBs
must be assigned to the Primary ECB for the channel
on which their FBM resides via a new parameter
added to them called “CHAN”.
CONTROL CONFIGURATION CONCEPTS
The Foxboro Evo control blocks are configured from
the Process Engineer’s Environment, which provides
access to the Block Configurator, Integrated Control
Configurator (ICC), or I/A Series Configuration
Component (IACC).