Azbil DCP31 - Page 127

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Chapter 7. PARAMETER SETUP
Note 1) Onheat/coolmodels,thissetshowtherelationshipbetween
heat-sideoutputandcool-sideoutputshouldbeprocessed
withrespecttotheMVresultingfromPIDoperation.
Note 2) ConstantsOLandOHfunctionasfollows:
Note 3) WhenMV≥50%,theheat-sidePIDsetisswitchedto.
WhenMV<50%,thecool-sidePIDsetisswitchedto.
Note 4) PIDsetselectioniscarriedoutbysettingvalueandexternal
switch.
Dead
zone
Output
(heat)
Output
(cool)
MV
100 %50 %
0 %
100 %
Control output
values
Dead zone<0
Dead
zone
Output
(heat)
Output
(cool)
MV
100 %50 %
0 %
100 %
Dead zone>0
Output
(heat)
Output
(cool)
MV
100 %50 %
0 %
100 %
Dead zone=0
Heat-side
output
Cool-side
output
MV
100 %50 %
0 %
100 %
Cool-side OH
Heat-side OL
Heat-side OH
Cool-side OL