![]() In our experience with Trane's BCU gateway, all we could rely on was present value. After all, he doesn't need the gateway, we do! ![]() There's no guarantee the gateway supplier has invested the significant effort required to ensure compliance. ![]() Rather, we've got to get specific and limited amounts of data from a gateway to a non-BACnet network. But in our own case and in Derek's, we're not dealing with BACnet systems. Indeed, when responsibly implemented, BACnet could well be a robust interoperability platform. > The BACnet protocol is quite substantial but it is designed to do everything that might be required in a control system from sensor bus through to system management bus. ![]() On February 27, 2003, Peter Whalley wrote: From my experiance seeing interoperability demonstrations at trade shows involving many different manufacturers, compliance with the standard has been fairly good to date at least at least with respect to exchanging point data at the management level. Their is also now an independent BACnet compliance testing laboratory that is testing and certifying BACnet products so we should see much better compliance than may have been the case in the past. For something simple like a smart sensor, you may only need possibly a few thousand bytes of compiled code so don't necessarily be put off by the complexity if that's your requirement. On the other hand it is quite possible to only implement a small subset of the protocol. ![]() Not the sort of think you would try to duplicate casually and not surprising given that the standard document is about 2 cm thick. I have been told by one developer that their full implementation comprised some 100,000 lines of code. The BACnet protocol is quite substantial but it is designed to do everything that might be required in a control system from sensor bus through to system management bus. ![]()
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