This is quite easy and we have done it several times, although probably not in the last 5 years. We used a company Synapsys who supply and configure another Trend module that adds to the Trend system. This then has an RS232 port for communication, Simple, works reliably, but not cheap, as they need to access and program the Trend system. I would guess that they probably now have a BACNET interface, as that is the current fashion. It is worth talking to them.
