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840 USE 106 00 January 2003 43
3
Theory of IEC HSBY Operation
At a Glance
Purpose This chapter presents the Theory of Operation for the IEC Hot Standby system.
What’s in this
Chapter?
This chapter contains the following topics:
Topic Page
IEC Hot Standby Definitions 44
How an IEC HSBY System Works 46
System Scan Time 47
State Ram Transfer and Scan Time 51
Layout of completely transferred state RAM in an IEC Hot Standby system 53