开放系统的十大问题（原版） 1. Can the devices from different manufacturers be installed and commissioned on the same physical wire and be capable of true peer to peer communication? "All devices (nodes) on the network shall be capable of true peer to peer communication, without requiring a host or zone controller." 2. Have the devices been tested for interoperable compliance? "All devices (nodes) on the network shall conform to the LonMark Interoperability Standards version 3.0 or higher and be LonMark tested and certified for compliance on the open systems network." 3. Is the integrator meeting the requirements for the network infrastructure? “The network infrastructure shall conform to the published guidelines for wire type, length, number of nodes per channel, termination, and other relevant wiring and infrastructure criteria.” 4. Are the network management and commissioning tools available from multiple sources and can all the nodes be installed with these tools? If a node needs custom configuration, is there a plugin available for use in a standard tool. "All devices (nodes) on the network shall be able to be installed and configured using a standard network management tool such as LonMaker for Windows or other LNS based tool. No non-open tool set for installation or configuration will be accepted. All tools must be generally available for purchase to any integrator from multiple sources." 5. Are the front end tools proprietary and closed? "Any host PC interface shall use openly available software packages that are non-exclusive. No closed software will be accepted. Software must be generally available on the market from multiple sources." 6. Who is doing the work on your building? “Integration of the controls network shall be performed by a qualified network integrator. A qualified network integrator must have attended at least 40 hours of training and have prior successful open systems jobs experience.” 7. Do you have control over your building? “All configuration tools, installation tools, Plugins, databases, software shall remain with the job and be owned by the property. All software tools shall be properly licensed and conveyed at contract sign-off.” 8. Are your tools open? “No exclusive or non-open integration tools, devices, or host software shall be used as part of this open system.” 9. How are you connecting to your data network? “If Internet or IP connectivity is specified all devices connecting to the LAN shall use the IP protocol. Any LAN to LON gateways or routers shall use the standard IP protocol stack and shall be transparent to the devices on the network (layer 3 routing).” 10. What controls are you using? “The control system shall be installed using the best available products from the currently available suppliers that meets the system specification. Controllers from multiple manufactures are encouraged.” Bonus Question: 11. Are you certain your network was designed and installed correctly? “System integrator shall provide a protocol analyzer log summary for each channel for a minimum of 48 hours showing system performance. The statistical summary shall show that all bandwidth utilization and error limits are within acceptable range and that there are no network traffic problems, node communication problems, or system sizing problems. Email: lonworks@gongkong.com