9.9.5 LimitController Setup After allocation of a digital input ( IO Setup) an adjustable limitation of the modulationcan be activated via a digital input (“D1”, “D2”, ..).Display as long as no allocation has been carried out in “IO Setup”: | - - - -|The limitation influences both outputs in operation with two control circuits.- - - - -Limit“Limit value” = max. possible modulation (e.g.speed reduction during night operation bytime switch).Setting range: “Limit” = “n-max” up to “n-min”.Factory setting: 100 % max. modulation, i.e. no limit.Setting depending on device tye in: % or rpm.nM50 %100 %DPMin.L= 70% Min.= 0 % Max. = 100 %50 %R0 %IS100 %ILL = 70% Min. = 35 % Max. = 85 %25.03.2013v_limit.vsdLimit (idealized principle diagram)nM Motor speedL LimitS SetpointR PbandD Speed controller: setting signalP P-controller: control deviation9.9.6 Minimum speed cut offController Setup This function is primarily significant for installation of the device as a pure P Controllerin refrigeration and air-conditioning technology.For operation mode speed controller 1.01 without function!Display for operation with two control circuits:“1. Min. speed cut off” for control circuit 1“2. Min. speed cut off” for control circuit 2OFFMin. speed cut offMsco = OFF (factory setting)If no “Min. speed” is adjusted, the fan stops withreaching the desired value.If “Min. speed” is adjusted (e.g. 20%), then no dis-connection of the fan takes place. I.e., always aminimum ventilation is ensured (fan does not gounder setting “Min. speed”).Msco. e.g. -2.0 KIt takes place a disconnection from setting “Min.speed”to “0”, if the given difference is reached re-lated to the desired value.At a plus value (+) before reaching the desired valueAt a minus value (-) after falling below the desiredvalue.nM50 %100 %IMin.Min. 35 % Max. = 100 %20 °CS7 KR27 °C-2.0 K10.05.2007v_min_luft_abschalt.vsdMinimum speed cut off (idealized principle diagram)nM Motor speedS SetpointR PbandI Actual valueOperating Instructions Fcontrol – model series FXDM25/32AM ProgrammingL-BAL-E212-GB 1451 Index 003 Part.-No.58/123
