CD Automation Revo TC 2ph User Manual page 35

CD Automation srl
3)
Deviati A ar
Also the deviation alarm can only be done on a " Controlling system" because it links the value of the
threshold set point but in some ways is a cross between Process and Band alarm .
For this reasons the deviation alarm acts as a process alarm where the alert threshold is added or removed
from the set point.
Again there are two possibilities:
A)
deviation alarm Up ,) > (SP . SA)]
B)
Deviation alarm Down ,) * (SP – SA)]
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