Daikin MicroTech III Installation And Maintenance Manual

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Daikin MicroTech III Installation And Maintenance Manual Manual pdf 10 page image

IM 968-4 • MICROTECH III CHILLER UNIT CONTROLLER 10 www.DaikinApplied.comC ommIssIonIng and ConfIguraTIonC ommIssIonIng and ConfIguraTIonAfter the L onWorks communication module has been installed,the MicroTech III chiller unit controller is ready for integrationinto a building automation system (BAS). The followingsection explains how the communication module, togetherwith the unit controller, support L onWorks network addressingrequirements. It then provides instructions for commissioningand configuring the communication module.LonWorks Network AddressingThe L onWorks communication module conforms to the networkaddressing rules as described in the L onWorks FTT-10AFree Topology Transceiver Users Guide (www.echelon.com).According to the standard, all device addresses are defined atthe time of network configuration. Device addresses have threeparts:1. The Domain ID - designates the domain. Devices mustbe in the same domain in order to communicate witheach other.2. The Subnet ID - specifies a collection of up to 127devices that are on a single channel or a set of channelsconnected by repeaters. There may be up to 255subnets in a domain.3. The Node ID - identifies an individual device within thesubnet.A group is a logical collection of devices within a domain.Groups are assembled with regard for their physical locationin the domain. There may be up to 256 groups in a domain. Agroup address is the address that identifies all devices of thegroup. There may be any number of devices in a group whenunacknowledged messaging is used. Groups are limited to 64devices if acknowledged messaging is used.A broadcast address identifies all devices within a subnet ordomain.External Interface File (XIF) and NXEFilesThe L onWorks communication module conforms to LonMarkguidelines. It is self-documenting so that any L onWorksnetwork management tool can be used for integration andconfiguration.An external interface file (a specially formatted PC text filewith the extension .XIF) is required, along with a L onWorksnetwork management tool, so the device can be designed andconfigured prior to installation.The NXE file contains the application image that is downloadedinto the L onWorks communication module.Resource FilesResource files contain definitions of functional profiles,network variables types, configuration property types, andenumerations. Resource files are required for displaying DaikinApplied-specific variables that are not included in the standarddevice profile. The L onWorks communication module uses theMcQuayChiller (Scope 5) resource files.The XIF, NXE, and Resource files are availableat www.DaikinApplied.com or www.lonmark.org.CommissioningFollow these steps to commission the L onWorkscommunication module:1. Verify the communication module is attached properly tothe unit controller.2. Connect the twisted pair cable to the communicationmodule’s network connector pins CLA and CLB(Figure 4).3. Download XIF, NXE, and Resource Files from eitherwww.DaikinApplied.com or www.lonmark.org.4. Use a L onWorks network configuration tool, such asLonMaker®, to map the device Neuron ID to the domain/subnet/node logical addressing scheme when it createsthe network image, the network address, and connectioninformation.5. Confirm that the BAS is ready to receive a networkdevice broadcast message.6. Press the service pin button. Do this by inserting the endof a 5/64” (2.0 mm) flathead screwdriver, Allen wrench,or similar tool with a narrow end, approximately 1.5inches (3.8 cm) into the small hole to the left of the LEDs(Figure 5).At this point, the initialization process begins. SeeTable 1 and Table 2 for descriptions of BSP and BUSLED activity. Once both LEDs turn a steady green,the module is capable of communicating betweenboth the unit controller and the LonWorks network.NOTE: Always cycle power to the unit controller after 1)commissioning a device, 2) de-commissioning anexisting device, and 3) subsequent re-commissioningof an existing device.ConfigurationThere are certain parameters that can be configured using theunit controller keypad/display. These variables are describedin Table 3. As a general rule, the L onWorks communicationmodule does not require configuration unless advised by thenetwork administrator.NOTE: Receive Heartbeat, Max Send Time, and Min SendTime are typical parameters that may need to bechanged for your network. They should be modifiedon an as-needed basis. Maintain default values ifpossible.The following steps describe how to set Receive Heartbeat foryour network. The same procedure can also be applied to MaxSend Time and Min Send Time.