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problem with rs485 communication with rcs tr16 through m1xsp
Posted 10 May 2009 - 02:44 PM
Well, yesterday, I had the AC fixed (re-attached) and plugged all the communication wires back into the TR16 unit as it was before, and now I'm getting values in ElkRM for heat and cool setpoint, but my temperature still reads 0. However, modifying the cooling setpoint seems to no have no effect on the thermostat.
Is it possible something was messed up on the TR16 unit itself so that it no longer communicates, or is it probably just something wrong with the wire itself?
Posted 10 May 2009 - 08:54 PM
They suggested I follow the Serial Communications Test from the manual (found on page 18 at http://www.resconsys...1-00930-09.pdf) to see if the thermostats are communicating correctly.
Posted 10 May 2009 - 09:10 PM
I have had the same problem in the past. I smoked the RCS RS-485 chip in the RCS controller. It is easy to replace. I just removed an extra that my HUB was not using. If you find a good source for these, let me know. I need to replace the one that I took from my HUB.
Posted 11 May 2009 - 09:41 AM
You might try mouser.com. They typically have a good selection of IC's and are DIY-friendly.
Posted 14 December 2011 - 01:06 PM
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