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In the most critical applications, a special design of the Advant OCS, the Advant Safety System,
is then applicable.
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Redundancy is achieved by duplication of actual hardware modules.
Options for redundancy in Advant Controller 450 are described in
. It is not necessary to order extra software to support a duplication of hardware.
From the configuration viewpoint, a redundant pair of I/O modules are kept together by a
common data base element. Normally, the element used in a single application has the extra
parameters needed for a redundant application.
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•
Always base your investment in redundancy on a relevant reliability and availability
analysis. Reflect on, for example:
–
Not only the control system itself but also field instrumentation and other production
equipment.
–
Costs of production stop vs. increased costs for a system with high availability.
–
Vulnerability, price and performance with different alternatives.
•
Separate redundant parts as far as possible to avoid common points of failure.
–
Make use of separate I/O subracks for redundant I/O boards.
–
Make use of separate submodule carriers for redundant communication interfaces.
•
Be aware of the increased need for maintenance and spare parts to keep a high level of
availability.
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See
in this manual,
Section 2.1, Site Planning Environment
in particular.
Summary of Contents for Advant Controller 450
Page 1: ...Advant OCS with Master software GYDQW RQWUROOHU User s Guide 3BSE 002 415R701 Rev A ...
Page 26: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xvi ...
Page 30: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xx ...
Page 488: ... GYDQW RQWUROOHU 8VHU V XLGH SSHQGL DUGZDUH 0RGXOHV A 48 3BSE 002 415R701 Rev A ...
Page 508: ...Advant Controller 450 User s Guide Appendix D Item Designations D 12 3BSE 002 415R701 Rev A ...
Page 518: ...Advant Controller 450 User s Guide Appendix F Load Calculation F 4 3BSE 002 415R701 Rev A ...
Page 522: ...Advant Controller 450 User s Guide Appendix G Memory Calculation G 4 3BSE 002 415R701 Rev A ...
Page 528: ...Advant Controller 450 User s Guide Appendix H Halt Codes H 6 3BSE 002 415R701 Rev A ...
Page 562: ...Advant Controller 450 User s Guide Index iv 3BSE 002 415R701 Rev A ...
Page 563: ......
Page 564: ...3BSE 002 415R701 Rev A March 2000 ...