Danfoss VLT AQUA Operating Instructions Manual

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

1 Introduction1.1 Purpose of these Operating InstructionsThe purpose of these operating instructions is to describethe Danfoss Cascade Controller Options MCO 101 andMCO 102.The operating instructions contain information about:• Application types• Installation• Configuring the system• Parameters• Configuration examplesThese operating instructions are intended for use byqualified personnel. Read these operating instructions infull in order to use the Cascade Controller Options safelyand professionally and pay particular attention to thesafety instructions and general warnings.1.1.1 Software VersionExtended Cascade Controller Option forVLT® AQUA DriveSoftware version: 1.9xTable 1.1 Software VersionNOTICEMCO 101/102 is software supported from version 1.24onwards.1.1.2 Cascade ControlThe Cascade Controller consists of an option boardcontaining 3 relays that is installed in option slot B. Onceoptions are installed the parameters needed to support theCascade Controller functions will be available through thecontrol panel in parameter group 27-**.MCO 101 and 102 are add-on options extending thesupported number of pumps and the functionalities of thebuilt-in Cascade Controller in the VLT® AQUA Drive.The following options for cascade control are available forthe VLT® AQUA Drive:• Built-in Basic Cascade Controller (standardCascade Controller)• MCO 101 (Extended Cascade Controller)• MCO 102 (Advanced Cascade Controller)For further information, see 2 Application Types.The Extended Cascade Controller can be used in twodifferent modes:• with the extended features controlled byparameter group 27-**• to extend the number of available relays for theBasic cascade controlled by parametergroup 25-**With MCO 101, a total of 5 relays can be used for cascadecontrol and with MCO 102, a total of 8 pumps can becontrolled. The options are able to alternate the leadpump with 2 relays per pump.NOTICEIf MCO 102 is installed, the relay option MCB 105 canextend the number of relays to 13.ApplicationCascade control is a common control system used tocontrol parallel pumps or fans in an energy efficient way.The Cascade Controller option enables control of multiplepumps configured in parallel by:• Automatically turning individual pumps on/off• Controlling the speed of the pumpsWhen using Cascade Controllers, the individual pumps areautomatically turned on (staged) and turned off (de-staged) as needed in order to satisfy the required systemoutput for flow or pressure. The speed of pumpsconnected to the VLT® AQUA Drive is also controlled toprovide a continuous range of system output.Designated useThe Cascade Controller options are designed for pumpapplications, however, it is also possible to use CascadeControllers in any application requiring multiple motorsconfigured in parallel.Operating principleThe Cascade Controller software runs from a singlefrequency converter with Cascade Controller option(master drive). It controls a set of pumps, each controlledIntroduction VLT® AQUA Drive MCO 101/MCO 102MI38C402 - VLT® is a registered Danfoss trademark 31 1