Danfoss VLT AQUA Programming Manual

Also see for vlt aqua: Instructions Design guide Instruction manual Operating instructions Design guide

Contents

[120] Lead Pump Start Starts/Stops the Lead Pump (controlled by the frequency con-verter). A start requires that also a System Start signal has beenapplied e.g. to one of the digital inputs set forStart [8]![121] Lead Pump Alterna-tionForces alternation of the lead pump in a Cascade Controller.Lead Pump Alternation, par. 25-50, must be set to eitherAtCommand [2] orAt Staging or At Command [3].AlternationEvent, par. 25-51, can be set to any of the four options.[130 -138]Pump1 Interlock -Pump9 InterlockFor the above 9 setting options, par. 25-10, Pump Interlock,must be set toOn [1]. The function will also depend on thesetting in par. 25-06, Fixed Lead Pump. If set toNo [0], thenPump1 refers to the pump controlled by relay RELAY1 etc. If settoYes [1], Pump1 refers to the pump controlled by the fre-quency converter only (without any of the build in relays in-volved) and Pump2 to the pump controlled by the relay RELAY1.Variable speed pump (lead) cannot be interlocked in the basicCascade Controller.See below table:Setting in Par. 5-1* Setting in Par. 25-06[0] No [1] Yes[130] Pump1 In-terlockControlled by RE-LAY1(only if not leadpump)Frequency Con-verter controlled(cannot be inter-locked)[131] Pump2 In-terlockControlled by RE-LAY2Controlled by RE-LAY1[132] Pump3 In-terlockControlled by RE-LAY3Controlled by RE-LAY2[133] Pump4 In-terlockControlled by RE-LAY4Controlled by RE-LAY3[134] Pump5 In-terlockControlled by RE-LAY5Controlled by RE-LAY4[135] Pump6 In-terlockControlled by RE-LAY6Controlled by RE-LAY5[136] Pump7 In-terlockControlled by RE-LAY7Controlled by RE-LAY6[137] Pump8 In-terlockControlled by RE-LAY8Controlled by RE-LAY7[138] Pump9 In-terlockControlled by RE-LAY9Controlled by RE-LAY85-10 Terminal 18 Digital InputOption: Function:[8] * Start Same options and functions as par. 5-1*Digital Inputs, exceptforPulse input.2. Parameter Description VLT ® AQUA Drive Programming Guide82 MG.20.O2.02 - VLT ® is a registered Danfoss trademark2