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SHUTDOWN Logic - WINDOW
The WINDOW shutdown logic selecon stops all processes except for the INDEPENDENT process when the SOURCE
value is at either the HIGH LEVEL or LOW LEVEL shutdown seng or between them. The processes can only be started
again once the SOURCE value is outside of this window (Image 3.4.19).
Time
LOW LEVEL
Events
SHUTDOWN CURRENT
VALUE
HIGH LEVEL
SHUTDOWN
INACTIVE
SHUTDOWN
INACTIVE
SHUTDOWN
SHUTDOWN
ACTIVE
SHUTDOWN
ACTIVE
SHUTDOWN Logic - INV WINDOW
The INV WINDOW shutdown logic selecon stops all processes except for the INDEPENDENT process when the SOURCE
value is above the HIGH LEVEL or below the LOW LEVEL shutdown seng. The processes can only be started again once
the SOURCE value is at or between these levels (Image 3.4.20).
Time
LOW LEVEL
Events
SHUTDOWN CURRENT
VALUE
HIGH LEVEL
SHUTDOWN
ACTIVE
SHUTDOWN
ACTIVE
SHUTDOWN
SHUTDOWN
INACTIVE
SHUTDOWN
INACTIVE
Image 3.4.19 · SHUTDOWN logic - WINDOW
Image 3.4.20 · SHUTDOWN logic - INV WINDOW