Honeywell HC900 Reference Manual page 59

Hybrid control designer

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Failsafe rules

If the controller is unable to access the physical channel or the sensor is faulty, and:

If Failsafe is "Use Value"

If Failsafe is enabled and downscale

If Failsafe is enabled and upscale

HC900 Hybrid Control Designer Function Block Reference Guide

Then OUT = Configured Failsafe value

Then OUT = Range Lo (linear)

Low Range Value of input type (T/C and RTD)

Then OUT = Range Hi (linear)

High Range Value of input type (T/C and RTD)

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