Reference Manual
00809-0100-4841, Rev. AA
May 2007
4-15
Rosemount 3490 Series
P117 Channel 1 Low Cut-off
Use for forcing D800 to zero while D851 is less than P117
P20x Displayed measurement units
P200 for PV (D800), P201 for SV (D801) and P202 for TV (D802)
P210 Optional damping of MCU PV (at 10 Hz)
Using D800 = [D800_before + ((D800_now - D800_before)/(1+10 * P210))]
For use of P115 and P116, refer to Section “Profile Calculations for Contents
and Flow Applications“ on page 4-24.
D800 is the PV (Process Variable) value of the 3490 Series Control Unit.
D801, D802, D840 and D842 are intermediate results. (They are useful for
trouble-shooting - see “Service and Health Checks“ on page 5-1.)
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