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PROCESS Logic - WINDOW
The WINDOW process logic selecon energizes the output when the SOURCE value is at either the HIGH LEVEL or
LOW LEVEL process seng or between them. The output is deenergized when the SOURCE value is outside of this
window (Image 3.4.11).
Time
LOW LEVEL
VALVE ACTIVE
VALVE ACTIVE
VALVE ACTIVE
VALVE INACTIVE
VALVE INACTIVE
Events
PROCESS CURRENT
VALUE
HIGH LEVEL
PROCESS Logic - INV WINDOW
The INV WINDOW process logic selecon deenergizes the output when the SOURCE value is at either the HIGH LEVEL
or LOW LEVEL process seng or between them. The output is energized when the SOURCE value is outside of this
window (Image 3.4.12).
Time
LOW LEVEL
VALVE INACTIVE
VALVE INACTIVE
VALVE INACTIVE
VALVE ACTIVE
VALVE ACTIVE
Events
PROCESS CURRENT
VALUE
HIGH LEVEL
Image 3.4.11 · PROCESS logic - WINDOW
Image 3.4.12 · PROCESS logic - INV WINDOW