Danfoss MCO 101 Manual

Danfoss MCO 101 Manual Manual pdf 13 page image

3 Supported Configuration3.1.1 IntroductionThe extended and advanced cascade controllers support a variety of different pumps and Drive configurations. All of these configurations must have atleast one variable speed pump, controlled by a VLT AQUA Drive, with the extended and advanced cascade controller option card installed. They support1 to 8 additional pumps each connected to either a Danfoss VLT Drive with master/follower or to line power through a contactor or soft starter for adirect online system.When setting up the system, it is necessary to create a hardware configuration, which communicates with the master to determine how many pumpsand drives are connected. The necessary hardware is described in the following hardware configuration examples.The following describes the features and how to use the extended cascade in parameter group 27:3.1.2 Extension of Basic CascadeUse of the extended cascade option MCO 101 as an extension ofthe basic cascade built into drive 3.1.2In applications already controlled by the built-in cascade controller in group 25**, the option card can be used to extend the numbers of relays for cascadecontrol. For instance, if a new pump is added to the system. It can also be used in case it is necessary to alternate the lead pump in systems with morethan 2 drives, which is the limit for the basic cascade without the MCO 101 option installed.Install the option in slot B, enable the basic cascade in P27-10. Please refer to AQUA Programming guide for parameter group 25 settings.Example: The electrical wiring diagram for the external equipment needed for systems with an alternating lead pump of four pumps using the basiccascade and the MCO 101 as a relay extension.Extended and Advanced Cascade ControllerOption 3 Supported ConfigurationMI.38.C2.22 - VLT® is a registered Danfoss trademark 3-13