Honeywell UMC800 Reference Manual page 25

2.5 AI Function Block,
Configuration Parameters, continued
Table 2-2 Analog Input Configuration Parameters, continued
Properties Group
Failsafe Use Value
field
Use Value
Downscale
Upscale
Burnout Check
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
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continued
Parameter Index#
N/A
5
5
5
Function Block Reference Guide
Parameter Description
The output value to which the
output will go to protect against
the effects of failure of the
equipment, such as, fuel shut-
off if there is loss of flame in a
furnace, or a sensor break.
Use the value entered in the
appropriate field.
LINEAR
OUT = Value set at "Low range
value" field.
T/C or RTD
OUT = Value of Low range
implied by input type.
LINEAR
OUT = Value set at "High
range value" field.
T/C or RTD
OUT = Value of High range
implied by input type.
Burnout check enable
(Thermocouples only)
OUT = Configured Failsafe value
OUT = Range Lo (linear)
Low Range Value of input type (T/C & RTD)
OUT = Range Hi (linear)
High Range Value of input type (T/C & RTD)
Function Blocks
Value or Selection
Enter a value in
Engineering Units
±9999 to ±99999
Click on Radio button to
select
Click on Radio button to
select
Click on Radio button to
select
Click on block to select
or deselect
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