Hi folks,
I'm attempting to control some Heatmiser Slimline-N thermostats via Crestron but I'm not receiving any Rx comms whatsoever...not even garbage...pure silence.
There are five Heatmiser UH-1 manifolds to which roughly five or six thermostats are connected. The Heatmiser TouchPad is not in use with this system, control is to be solely from Crestron.
I've tried the following:
- Checked RS-485 port settings and pin-outs are correct on Crestron CP3. (pin 2 and 4. pin 1 is not in use)
- Removed any references to this particular port from other programs running in parallel on the CP3.
- Tried swapping polarity (swapping pin 2 with pin 4).
- Tried the Y&B connectors on the UH-1's touch pad port, as well as C&D.
- Tried the Y&B connectors on the UH-1's network port (that daisy chains to other UH-1s).
- Used another Crestron processor to rule out any port issues.
- Checked thermostat addresses.
- Connected to another UH-1 on the Heatmiser bus.
- Disconnected all other UH-1s and attempted to control only the thermostats connected locally.
- Connected Crestron directly to a thermostat's Y&B terminations on the UH-1 and attempted to poll that particular thermostat for data. I cannot connect Crestron directly to any thermostat as the Y&B ports have been covered in glue...I imagine to keep wires in place...no sign of any phoenix connectors.
I'm using version 3 of Ultamation's Heatmiser (RS485) module. So Oliver, if you're reading this expect a call from me soon...I must be missing something.
Any assistance greatly appreciated. I've exhausted all possibilities.
Best,
Fred.
