Trane BCU-LON-Bacnet

[katman96]

We have a new Trane project with a Bacnet BCU(BMTX) and Comm5 trunks to all of its RTU's, VAV Boxes, etc. We need to map the LON points up to the BCU and expose them as Bacnet Points to an Automated Logic System. We have access to the Summit Head End. Is there someone that can help with this? If someone could walk me through adding a point (on the Trane side) that would be great. Thanks

[scrooloose]

Assuming you're the same poster on niagara-central but here is what i posted there if not.

Get on the front end. Go to Start -> All Programs -> Tracer Summit -> User Guides -> select Program.pdf
or C:\Program Files\Tracer Summit\PDFDocs\Program.pdf

Go to Chapter 16 Creating Analog Inputs

The whole chapter covers how to make each point type.

[katman96]

Yes I'm the same poster. Thanks for your help. Is there any way you could send me that .pdf? I cant get to the jobsite today and I would like to read up on that over the weekend. Either way, thanks for the help..

[Slack]

setup/(Inputs/Outputs)/Analog Input...
New
Name it whatever (eg. AC-1 Space Temp)
Setup tab

Ok this is important.. the property referencer has to be mapped correctly click the box on the right should have 3 dots in it. You should get 3 drop down boxes. The first one is Type, for this example a Lon SCC. The next one is Name, for this example AC-1. The last box is Property, example Space Temperature: Active.

Heres something else to keep in mind Trane is not true BACnet or Lon, I have seen it described as Tracknet and Tron... this is more honest and makes me chuckle everytime I get to repeat it. The BCU is more of a translator than anything else. Unless something has changed, you will only be able to pull 250 points (TOTAL) out of each BCU. You will need to do a Site BACnet Report to figure out how many points are already being used.
This is done by clicking on "status" up at the top, then Reports.
Make sure that Standard Live is checked then click OK
For the Report Type you choose "Site Reports"
And Report Name "Site BACnet Report"
You can sort by Object ID or Name whatevers easier for you.
Then you need to select all of the BCUs (or whatever BCUs you want points from)
Click OK
This will give you a list of all of the points that are currently in the database along with its Object ID. You will have to count them and subtract from 250, its result is how many you can add.

The max points may have changed with the BMTX but I dont think so, if anyone else out there has any idea let us know.

[scrooloose]

whew way to resurrect that one from the dead.

Think the 250 point limit was just for RS-232.

For anything else you are just limited by the size the BCU can handle, which is couple thousand.

[Slack]

I believe Kat wants to export the points out of the BCU, not import them into it.

I checked with my friendly neighborhoor Trane controls guy to see how things have changed, and as of the .pdf he had, dated Dec 2010, BCUs still only support 250 points. It didn't specify whether it was a BMTX, BMTS, or either capacity BMTW.... so who knows... I would plan for 250, anything more would be gravy.

[kontrolphreak]

Recently completed integrating a BCU and it's points into WEBCtrl over IP and was pushing 800 objects with no problem. Man does it suck having to create and map 800 points twice. You can actually use WEBCtrl to create the objects in the BCU, but linking to their proprietary (or in your case LON) has to be done by Summit.

kontrol out

[scrooloose]

I believe Kat wants to export the points out of the BCU, not import them into it.

I checked with my friendly neighborhoor Trane controls guy to see how things have changed, and as of the .pdf he had, dated Dec 2010, BCUs still only support 250 points. It didn't specify whether it was a BMTX, BMTS, or either capacity BMTW.... so who knows... I would plan for 250, anything more would be gravy.

Not sure what documents he is looking at but I have done dozens of integrations where i am exporting 2000-3000 points. Once a AIP/BIP etc is made in the BCU it is automatically made available via BACnet. So you are just limited on how many I/O's the BCU will handle to export.

[dave2142]

The point limit only applies to RS232 which hardly anyone uses now anyways. Only limit is really how long you fingers can last to create all the points. The .pdf is very misleading as you need to read very carefully to catch the little line saying the limit is for RS232.