I'm unable to get a RCS TR40 to communicate with the M1XSP. The M1XSP is bus enrolled and has been supporting a M1DBH without problems. M1XSP jumpers and switches are set in accordance with Elk's Installation Manual for the TR40 (i.e. Baud=000, Mode=1001;JP3=1,JP2=0;JP1=0;Address=1000). I've checked (and rechecked) the M1XSP->TR40 wiring for terminations and continuity. The TR40 powers up and the WDU communicates with the TR40 controller configured properly per RCS' manual. I'm able to manually control the furnace from the thermostat wall display. The only problem appears that there is no RS-485 communication between the RCS controller and the M1XSP.
Short of using a serial line analyzer to troubleshoot, I don't know what to do next. Any ideas? Thanks for your help.
Short of using a serial line analyzer to troubleshoot, I don't know what to do next. Any ideas? Thanks for your help.