Assuming 2 motion detectors (one at the top of the stairs and one at the bottom). ?One solution is to run the motion detectors into logic wave pulse symbols so the output of the motion sensor is reduced to a single logic wave and can then be run into a truth table without worrying about circular logic. ?If the top of stair or bottom of stair motion detector is tripped and the other motion detector hasn't been tripped (latch is clear) then start the appropriate scene and set the latch. ?If one of the motion detectors is tripped and the latch is set then don't do anything because you've already started your lighting scene.
Every time a motion detector is tripped trigger a retriggerable one shot. ?This is going to be the timeout period for the lighting scene. ?After the ROS has expired the person has left the stairs and you can turn off the lighting scene and clear the latch. ?
I personally like using truth tables.?
This is going to require some real world testing. ?You could have issues with multiple people going different directions, etc. It will depend on how your scenes act.
Hope this helps
Jay
------ Original Message ------
Sent: 1/19/2017 2:05:52 PM
Subject: [Crestron] Lighting based on multiple occ sensors
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Have a client that has multiple occupancy sensor in his staircase and would like to trigger different loads in different ways depending on which direction he is going. Up versus down of course. ?Anybody done something similar and would like to share? ?Or suggest ideas on just how to accomplish this.
