ABB Advant Controller 450 User Manual

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For further discussion of various aspects of reliability, availability and security, see separate
documentation. Some keywords follow:
• Solid mechanical and electrical construction
• Security against electrical interference
• High-quality components
• Well-tested electronic units
• Thoroughly developed and tested modular software
• Easily interpreted program language for application programs, AMPL
• Complete documentation
• Integral supervision and diagnostic functions
• Powerful tools for testing
• On-line replacement of faulty hardware units
• After-sale service
• Redundancy.
Below you can find important information regarding security. Descriptions of the provided
diagnostics and the possibilities of redundancy in the Advant Controller 450 also follow.
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From the viewpoint of security, the behavior of the control outputs to the process in connection
to ordered or unintentional interrupts is very important.
Advant OCS has a straightforward philosophy: all process outputs are controlled to zero (loss of
elevated zero) and relay outputs are de-energized.
Unintentional interrupts are caused, for example, by the following events:
• Fault in central processing unit and memory
• Loss of power supply
• Fault in power supply
• Fault in parallel bus communication (backplane bus on CPU and I/O subrack).
In spite of the fact that an Advant Controller 450 is a very reliable system, reset of outputs to
zero cannot be guaranteed during all conditions. Always assume a combination of errors or an
incorrect system handling which can cause an output to behave in an unexpected way. This is of
great importance when it comes to personnel safety and preventing expensive technical
equipment from being damaged.
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Duplication of control system functions is one way to ensure that all tasks are performed
correctly. It is, however, very important to emphasize that the security in a process control
system, when it comes to personnel safety, must never be based on duplication of system
functions alone. You must always consider other measures as well.

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English