FOXBORO CP40 I/A Series® Hardware Control Processor 40

FOXBORO CP40 I/A Series® Hardware Control Processor 40

The Control Processor 40 is a high-end optionally  fault-tolerant station in the Control Processor family  (CP10, CP30, CP40) that has:

• a larger memory capacity to support a greater  number of blocks 

• a faster processor for increased block processing

With high performance, the CP40 is both economical  and in line with today's advancing technology. Other  members of the CP family are easily upgradable to  CP40 capabilities.

The Control Processor 40 performs regulatory, logic,  timing, and sequential control together with  connected:

• Fieldbus Modules (FBMs) 

• Fieldbus Cluster I/O Cards (FBCs) 

• SPECTRUM Migration Integrator I/O 

• SPEC 200 Migration Integrator I/O 

• SPEC 200 MICRO Migration Integrator I/O

Enhanced Reliability

The Control Processor 40 offers optional faulttolerance for enhanced reliability. The fault-tolerant  control processor configuration consists of two  parallel-operating modules with two separate  connections to the Nodebus and to the Fieldbus.

The two control processor modules, married together  as a fault-tolerant pair, are designed to provide  continued operation of the unit in the event of virtually  any hardware failure occurring within one module of  the pair. Both modules receive and process  information simultaneously, and faults are detected by  the modules themselves. One of the significant  methods of fault detection is comparison of  communication messages at the module external  interfaces. Upon detection of a fault, self-diagnostics  are run by both modules to determine which module  is defective. The non-defective module then assumes  control without affecting normal system operations. To further ensure reliable communications, the faulttolerant control processor performs error detection  and address verification tests in its Nodebus and  Fieldbus interfaces.

For enhanced reliability during maintenance  operations, the Control Processor 40 is equipped with  a recessed reset button, located at the front of the  module. This feature provides for manually forcing a  module power off and on (reboot) without removing  the module from the enclosure.

Diagnostics 

The Control Processor 40 uses three types of  diagnostic tests to detect and/or isolate faults: 

• Power-up self-checks 

• Run-time and watchdog timer checks 

• Off-line diagnostics

Fieldbus Modules  

Fieldbus Modules provide connection of digital I/O,  analog I/O, and Intelligent Transmitters to control  processors. There are two types of Fieldbus Modules:  Main and Expansion. Some main modules can be  expanded using an expansion module.

A wide range of Fieldbus Modules is available to  perform the signal conversion necessary to interface  the control processor with field sensors and  actuators. For further information on the Fieldbus  Modules, refer to the Fieldbus Modules Product  Specification Sheet (PSS 21H-3B1 B3).