HVAC Control in the New Millennium.pdf - HVAC.Amickracing

PC-based Control, Software and Bus Trendsnetwork applications. The network is fully compliant with the IEEE802.11 specification, which allows operation with terminals, printers,and bridges from different manufacturers. Auto rate selection automaticallyselects the optimal operating modes for the wireless network.Universal Communication ModulesThese modules allow ControlNet, Interbus, and Ethernet networkingto a universal communication system (UCS), which provides anopen-architecture, industrial, device-to-network interface for networking.The UCS client interface allows plug-and-play with all industrialnetworks supported by UCS master or slave modules.Installing the appropriate network personality module into theirdevice allows users to interface to both modern and legacy networks.The modules can be upgraded in the field and feature electrical andsoftware independence for each supported network. UCS is capable ofbidirectional communication and supports a 64-KB addressable datarange.DeviceNet Troubleshooting ToolsDeviceNet users have a tool to troubleshoot their networks. Thehand-held DeviceNet Detective can quickly assess network problems.The unit has the following capabilities:• anonymously eavesdrop on a network,• register on the network as a slave,• monitor voltage levels on the network, report errors and diagnosticmessages,• set node numbers,• indicate which node numbers are being used, and• report which nodes are masters or slaves.©2001 by The Fairmont Press, Inc. All rights reserved.