Not sure if this is the correct category or if the post should be split up. I could see it in a couple of different categories. I am considering the T3 TB or BB to monitor and control a Bacnet MSTP network consisting of approx 15 Honeywell VAV controllers, a few environmental sensors such as the AirLab and a couple of misc.controllers (maybe T3’s, maybe not). I have a few questions to help me evaluate your system.
The Honeywell VAV controllers have fixed point numbers in excess of 1500, so your T3 will not work if the the max point number is 255 as stated in the current data sheet. I have seen forum posts indicating the number has been increased. What are the T3’s current limits for maximum point number per device, number of 3rd-party devices on an MSTP net, and total points (if any)?
I plan to add a second similar Bacnet MSTP network in the future, and it would be good to use the 2nd T3 RS-485 port to control that network. I have seen forum comments that the T3 did not support Bacnet MSTP on both RS-485 ports at the time of the post. Is that currently a limitation?
I want to trend log several points from each of these devices. What are the limits on trend logging in terms of number of points per device, number of devices, total number of points logged, and maximum number of values stored? I also believe that the T3 will log to SD card while it isn’t connected to a T3000 computer and then upload the results when it connects. Is that correct?
Your programming examples show two methods for addressing 3rd-party BACNET devices, one using cabinet, MSTP device address, and point, and another using instance number and point. Has the former been replaced by the latter? Also, does Control Basic have a way to programmatically address an MSTP device, i.e. where the device address is a variable? I’d like to read devices sequentially in a loop to check points against limits and the only way I see to do that is to read each individually using inline code.
I would like to build a table of devices containing info such as MSTP address, device type, parameter upper and lower limits, etc. that Control Basic can access. It appears that the system builds a similar table but I don’t see a way to add fields or to access it from Control Basic. Do you have any suggestions?
Your user manual mentioned a T3 simulator but the download link was TBD or something similar. Is there a way to test Control Basic programs, and particularly with 3rd party MSTP devices, without having a T3? I downloaded and installed the T3000 software and connected an RS-485 adapter to the computer, but T3000 would not see 3rd party devices (which I discovered was normal without a T3) even though Yabe did see them.
Lastly wondering if the above-mentioned limits for the T3 Nano are different than the T3 TB or BB, since it has a different processor and presumably a different codebase. Also, one forum post indicated that adding an SD card to the Nano was in the works which would allow it to log. Is that feature now available?