Danfoss VLT AQUA Drive FC 202 Design Manual

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Danfoss VLT AQUA Drive FC 202 Design Manual Manual pdf 34 page image

ensures that the system or auxiliary equipment is in theproper state before the drive is allowed to start the motor.2.6.15 Smart Logic Control (SLC)Smart logic control (SLC) is a sequence of user-definedactions (see 13-52 SL Controller Action [x]) executed by theSLC when the associated user-defined event (see 13-51 SLController Event [x]) is evaluated as TRUE by the SLC.The condition for an event can be a particular status orthat the output from a logic rule or a comparator operandbecomes TRUE. That leads to an associated action asshown in Figure 2.19.. . .. . .Par. 13-11Comparator OperatorPar. 13-43Logic Rule Operator 2Par. 13-51SL Controller EventPar. 13-52SL Controller Action130BB671.13CoastStart timerSet Do X lowSelect set-up 2. . .RunningWarningTorque limitDigital input X 30/2. . .=TRUE longer than... . .. . .Figure 2.19 SCL Event and ActionEvents and actions are each numbered and linked in pairs(states). This means that when event [0] is fulfilled (attainsthe value TRUE), action [0] is executed. After this, theconditions of event [1] is evaluated and if evaluated TRUE,action [1] is executed and so on. Only one event isevaluated at any time. If an event is evaluated as FALSE,nothing happens (in the SLC) during the current scaninterval and no other events are evaluated. This means thatwhen the SLC starts, it evaluates event [0] (and only event[0]) each scan interval. Only when event [0] is evaluatedTRUE, the SLC executes action [0] and starts evaluatingevent [1]. It is possible to program from 1 to 20 events andactions.When the last event/action has been executed, thesequence starts over again from event [0]/action [0].Figure 2.20 shows an example with four event/actions:Figure 2.20 Order of Execution when Four Events/Actions areProgrammedComparatorsComparators are used for comparing continuous variables(output frequency, output current, analog input etc.) tofixed preset values.Par. 13-11Comparator Operator=TRUE longer than.. . .. . .Par. 13-10Comparator OperandPar. 13-12Comparator Value130BB672.10Figure 2.21 ComparatorsLogic RulesCombine up to three Boolean inputs (TRUE/FALSE inputs)from timers, comparators, digital inputs, status bits andevents using the logical operators AND, OR, and NOT.. . .. . . . . .. . .Par. 13-43Logic Rule Operator 2Par. 13-41Logic Rule Operator 1Par. 13-40Logic Rule Boolean 1Par. 13-42Logic Rule Boolean 2Par. 13-44Logic Rule Boolean 3130BB673.10Figure 2.22 Logic RulesProduct Overview VLT® AQUA Drive FC 20232 Danfoss A/S © 09/2014 All rights reserved. MG20N62222