I have just had my older alarm system replaced with a Comfort system to integrate with my existing C-Bus system and now I'm keen to get to grips with the programming.
I know the literature says that you can read temperature values and take an action based on their level but I can't find how to do this. I wish to automate my zoned heating. I have 8 C-Bus thermostats and a couple of the newer thermostat sensors in the property but how do I read their current temperatures (into counters ?) and how do I change the setpoints ?
Also I have several scene trigger groups set up that work well. How do I trigger a response in Comfort when one of these scenes is set (not via a dummy lighting group within the scene) ?
Lastly my lighting (56) application is nearly full now - can I trigger responses from the additional lighting applications - I think C-Bus defines a few of these ?
The UCM/Cbus is able to send commands to any Cbus applocation
However it can only recognise commands from the Lighting application and read the values of the group addresses into Counters and activate Responses based on the values.
The UCM/CBus also handles the Security application and the Clocks and Timekeeping application withiut any special programming
Hence it will not be able to read the thermostats unless it is on a Lighting group address I dont think that the literature says that the UCM/Cbus can handle tempretare values. Other UCMs like KNX and Velbus can do this, and in future the UCM/CBus firmware will have this capability to handle other applications
If your scenes are on a lighting group then this can also lauch a Counter response
The counter response should have the format
If LastUCMCounter=0 then
LastUCMCounter is the value in the Cbuss Group address, ie 0 to off, 255 for on and 1 to 254 for levels in between
You can send commands to other Cbus group addresses based on the scene command
****** looks like I've been a bit too hasty when I specified this Comfort system. It's not the intallers fault as I quickly read the literature and he has no C-Bus experience. I should have spent more time researching this.
I was mislead by marketing of Cytech's site like these (in bold)
"Allows Comfort to communicate with C-BUS to send commands to any group address as well as receive status and commands." Surely that should have a caveat about only support for one lighting group 56 for status and that commands can only be sent on lighting compatible applications. many other common applications are not lighting compatible ? It's misleading and as I said my 56 group is near full so I am also using a second lighting group , one of several official ones.
ident wrote: I dont think that the literature says that the UCM/Cbus can handle tempretare values.
It does.... "allows C-Bus switches and inputs (e.g. temperature, light sensors) to trigger alarms to dial-out to programmed telephones when preset levels are exceeded." Again misleading, I have the newer model 5031 temperature sensors as well as thermostats and I can't do this. The temp sensor operates in 4 modes (temp broadcast, measurement, HVAC or legacy) and for use as sensors for heating control you can't use the latter. As I undertsand it now none of these applications is supported by the C-Bus interface for receipt of temperature.
I also have a light level sensor, as yet unused and I don't know what application that returns it's Lux level on but I'm guessing it might be the measurement application. I know it can switch lighting groups itself based on preset levels but that's not what the above says Comfort can do.
functions as a central controller for C-Bus. C-Bus is a distributed system with each device having its own intelligence and able to respond according to its own device type and the way it is programmed. In an intelligent home or office environment, it can be desirable to have a controller which is able to coordinate the functions of all the subsystems including security, lighting, HVAC, and others. Comfort is able to take action based on conditional logic... again totally misleading as it specifically states the HVAC application and yet it is not supported. This last one is really misleading.
Cytech - you really should be clearer in your marketing .
Anyone suggest how I might work around this ?
Last edited on Saturday Aug 13th, 2011 07:59 am by Curran
I've got the older 5031 Temperature sensor and I have my PAC set a Group/Counter to the value of the Temperature. I also do the same for my Light readings and change Lux to Percentage and stick that into a counter as well.
In Comfort I read the value and do whatever is required at the time. Currently it's just for information on my Floorplans but it I am hoping it would one day switch the kettle on, and make the coffee, on a cold day but haven't got that right yet :-)
Apologies if that information caused you to make a wrong decision
It was not deliberately misleading. At the time that was written the Lighting application was the only known application and the temperatiure sensors were not available. "Inputs" were referring to external inputs for temperature and light sensors. "subsystems including security, lighting, HVAC" did not refer specifically to Cbus, but other subsystems in the home as Comfort works with many subsystems.
These sections have now been removed nevertheless
The UCM/Cbus shall be upgraded in the future to support other applications, just like the original UCM/EIB was upgraded to be highly configurable, and that firmware upgrade shall be avallable using the Bus upgrade method
I think you will find that what Comfort has to offer for a Cbus installation is still considerable, Time Programs, Logic Engine, Sunrise/Sunset with automatic daylight saving, Intruder alarm fully integrated to Cbus, Scene control of multiple Cbus grroup addreses for any application, telephone control with Voice menu etc