Dimming and PIR control

Looking for some advice as to the best way of setting this up. I have a client who has a control room with CBus PIR control of DSI ballasts. They want to add a single switch via a bus coupler to dim the lights in the room up and down. What is the best setting for the bus coupler so that the PIR's do not turn the lights back to full when they see movement? I've tried setting it to 'toggle memory 2' which does seem to work some of the time but it's not consistent.

Any ideas?

Thanks

 

Disable PIR

Have not done this so am only thinking out loud. I have a feeling that it is possible to disable the PIR depending on the state of a group address, if this was the case when the bus coupler group is active ie/ having been pressed to dim the lights you may be able to have it disable the PIR. When the bus coupler switch is toggled off this should enable the PIR to take over as normal. I probaby should have tried this first as it may be wrong, but it may give you a start.

Regards,

Peter Brown.

 

There are a few ways to do it (e.g. Logic or disable PIR..etc), or no way to do it. It depends on what your client want exactly.

When are the Fluorescent controlled by or not controlled by the PIR? So, if you change the light level with switch and want the PIR stopped working, when would you want it back? If your client's request make sense in terms of logical thinking, it should be able to do.

If your coupler have four inputs, you may use one for PIR enable/disable. Set it to timer function if required. In this case you need to manuelly disable the PIR at least.

Or you can use logic, so the coupler can set the maximum level of the light and the PIR couldn't make it brighter than the coupler allows. In this case your PIR may not work if you have turned the light off with the coupler already.

Just one thing, the memory stores in coupler (store 1 and store 2) have nothing to do with those in PIR or anythingelse, so you can't use them for cross unit controls.

 

The two functions are completely separate, the PIR's need to control the on / off function keeping the lights on whenever someone is in the room but never changing the level, the bus coupler inputs need to control the light level only. In other words:

Someone enters the room, they don't touch the level controls and 5 mins after they leave the lights turn off.

or

Someone enters the room, they dim the lights and leave them at that level and 5 mins after they leave the lights turn off.

Hope this explains my problem better?

Thanks

Nick

 

Use the logic in the dimmer.
Have one address in the PIR and another address in the bus coupler, use the "AND" function in the dimmer logic.
Make the bus coupler a dim up and a dim down, but not to turn off.
You may want to set a min level in the dimmer so that no one can dim the lights below say 30%.
This will mean when a persom walks in the PIR will turn the lights on to what ever the level at the switch is set, the persom can dim up/down the lights from the switch and then they will turn off via no movement at the PIR.

 

Try this thread -

http://www.cbusforums.com/forums/showpost.php?p=9469&postcount=14

 

All these methods have pros and cons. Normally I test it on site

In fact, if the single sensor can detect most movement in the room, you maynot need to do anything. The Sensor turns on the light at detection. If the light is already on, no matter 100% or 30%, the "turn on" function wouldn't do anything. So if it is dimmed, the sensor wouldn't dim it back up (if ON key is used in the function block as it normally does). The sensor would only switch off the light after five minutes of zero detection.

If the sensor couldn't detect all the movement, that is another problem. This way you can't define entering or leaving the room, and the light will be switched off anyway.