FOXBORO Z-Module Control Processor 270 (ZCP270)

Fiber cables are connected so that splitter/combiners

pass inbound traffic from a switch to both modules,

and pass outbound traffic from the primary module

to a switch.

Each splitter/combiner pair mounts in an assembly

that either mounts in a chassis assembly for 19-inch

racks or fastens to the DIN rail in the enclosure. The

splitter/combiner is a passive device that does not

require electrical power.

ENHANCED COMMUNICATIONS

The Foxboro Evo architecture uses an Ethernet

control network with 100 Mbps data

communications between the ZCP270s and the

Ethernet switches (see Figure 2).

The ZCP270 can also communicate with serial and

Ethernet devices, such as PLCs, via Field Device

System Integrators and FCM100Ets/FCM100Es. This

allows connection to new device interfaces without

any changes to the controller software.

ON-LINE IMAGE UPDATE

For fault-tolerant ZCP270 modules, on-line image

update replaces the executable image (operating

system) of a running ZCP270 with a newer image

without having to shut down the equipment being

controlled by the ZCP270. New product

enhancements can be brought on-line in

1.5 seconds for heavily loaded controllers; less for

lightly loaded controllers.

Because the ZCP270 contains its executable image

in internal flash memory, and has sufficient RAM to

hold a new executable image at the same time, on

line image updates are now much easier to perform.

TIME SYNCHRONIZATION, SOE, TDRA

The Foxboro Evo system supports time

synchronization using either an externally maintained

optional source of Universal Coordinated Time (UTC)

from GPS satellites or an internal source using

proprietary software. ZCP270s and their FCM100Ets

receiving time updates via the external time source

synchronize their FBMs to 1 ms. For more

information, refer to PSS 21S-1C2 B3.

Time stamping is used for alarm messages, values

sent to the historian, and the new Sequence Of

Events (SOE) and Transient Data Recorder and

Analyzer (TDRA) features.

SOE data are discrete points that are time stamped

at the FBM, optionally to 1 ms, and sent to the

workstation on a change basis. TDRA data are

analog points that are time stamped at the FBM and

sent to the workstation every 10 ms. These new

features are supported by client software in the

workstation. To support SOE and TDRA, the

FCM100Et must be installed on the same network as

the workstation collecting the data. For information

on this software, refer to PSS 21S-2B9 B4 and

PSS 21S-2B10 B4

SOFTWARE FEATURES

The ZCP270 performs regulatory, logic, timing, and

sequential control, as well as data acquisition, alarm

detection, and alarm notification. Process variables

are controlled using time-proven algorithms

(mathematical computations performing specific

functions). The algorithms are contained in functional

control blocks, which are configured by on-site

process engineers to implement the desired control

strategies. The versatility of the algorithms, coupled

with the variety of FBMs available, provides control

capabilities suited to a broad range of process

applications. Control strategies ranging from simple

feedback and cascade loops to highly sophisticated

feedforward, nonlinear, and complex characterization

control schemes are readily implemented.

The ZCP270 also provides the following features:

 Infrared communications with the controller

enables you to set and read the controller

letterbug via the Letterbug Configurator.

 Alarm enhancements to the function blocks:

re-alarming on changes to alarm priority,

re-alarming based upon a configurable time delay

deadband, and alarm suppression based upon

time.

 Optional UTC external time synchronization.

 Improved controller performance.

 Optional self-hosting mode (I/A Series software

v8.4-v8.8 or Control Core Services v9.0 or later)

allows the ZCP270 to start up and run, executing

its configured control scheme using the

checkpoint file stored in flash memory. This

allows the ZCP270 to boot itself with a valid

control database even if its host workstation is

not present.

Self-Hosting Feature, Available with 200 Series

FBMs Only

The self-hosting feature is recommended only for use

in ZCP270s which are used with 200 Series FBMs.

All of the information necessary to reboot 200 Series

FBMs is included in non-volatile flash memory on the

ZCP270. However, the flash memory on the

100 Series FBMs and related products on the 268k

fieldbus does not include this information, and they

require the workstation host to be present to reboot.

More details on the self-hosting feature are available

in DIN Rail Mounted FBM Subsystem User’s Guide

(B0400FA).

DEVICES SUPPORTED

The ZCP270 with FCM100Ets supports the following

devices:

 All 200 series FBMs (FBM201. FBM202. and so

forth)

 Field Device Systems Integrator (FDSI) modules

 Intrinsically Safe I/O Subsystem (ISCM)

 DCS Fieldbus Modules for Siemens APACS+™

Systems

 DCS Fieldbus Modules for Westinghouse

WDPF® Systems.

 DCS Fieldbus Modules for Fisher's PROVOX®

Series 20 Migration with HART.

 DCS Fieldbus Modules for Honeywell® TDC

2000 Systems with HART.

The ZCP270 with FCM100Es supports the following

devices on the 2 Mbps module Fieldbus:

 All 200 Series FBMs (FBM201. FBM202. and so

forth) - both Compact or standard types