Samson TROVIS 5573 - Page 152

16-70 EB 5573 EN
Appendix A (conguration instructions)
16.4.7 On/off control
Theowtemperaturecanbecontrolled,forexamplebyactivatinganddeactivatingaboiler.
ThecontrollerswitchesontheboilerwhentheowtemperaturefallsbelowthesetpointbyT
=0.5x'Hysteresis'.WhenthesetpointisexceededbyT=0.5x'Hysteresis',theboileris
switched off again. The greater the value you choose for 'Hysteresis', the less frequent switch-
ing on and off will be. By setting the 'Minimum ON time', an activated boiler remains
switchedonduringthisperiodregardlessoftheowtemperatureuctuations.Similarly,a
deactivatedboilerwillremainswitchedoffregardlessoftheowtemperatureuctuationsif
theMin.OFFtimehasbeenspecied.
Functions Default Conguration
Control mode 1
5.0°C
2min
2min
CO1,2,4->F12-0
Hysteresis:1.0to30.0°C
Min.ONtime:0to10min
Min.OFFtime:0to10min
16.4.8 Continuous control in control circuit Rk1
TheowtemperatureinthecontrolcircuitRk1canbecontrolledusingaPIDalgorithm.The
valveinRk1controlcircuitreceivesananalog0to10Vsignalfromthecontroller.Whena
systemdeviationoccurs,'Proportional-actioncoefcientKP'immediatelycausesthe0to
10Vsignaltochange(thegreatertheKP,thegreaterthechange).Theintegralcomponent
becomes effective with time: 'Reset time Tn' represents the time which elapses until the inte-
gral component has changed the output signal to the same extent as the immediate change
performed by the proportional component (the greater Tn is, the slower the rate of change
will be). Due to the derivative component, any change of the system deviation is incorporat-
ed into the output signal with a certain gain (the greater 'Derivative-action time TV' is, the
stronger the change will be).
Functions Default Conguration
Control mode 1
2.0
120s
0s
35s
CO1->F12-1
KP (gain): 0.1 to 50.0
Tn(resettime):1to999s
TV(derivative-actiontime):0to999s
TY(valvetransittime):15,…,240s