We’ve talked about Insteon Scenes in the context of the ISY-994i and the MobiLinc software, but now let’s look into what they are and what they can do in more detail.

What is a scene?
At its core, a scene is simply a collection of devices, the states associated with it (such as on/off or dim level), and how to get there (called “ramp rate” – you can do a slow dim of the overhead lights while instantly turning on the curio cabinet lights, for example). The always-helpful Universal Devices wiki has an informative page on scenes where you can learn how to create them. The example given on that page is the creation of a “movie scene”, where with one button press you can change the dim levels of multiple devices (such as lights) at one time. There’s also a possibility that you may create a “home” scene to turn on multiple lights at once when you come home at night, and turn them all off when you leave – or you could even create a separate “away” scene that turns off all the lights, but leaves the front porch light on at 100% brightness and the back porch at 75%.

What are scenes “normally” used for?
I’ve seen a high-end Crestron home that has LOTS of lights also have lots of reasonably complex scenes, where one button can turn on the hallway and the living room lights, for example. But in smaller and particularly retrofitted houses where you’ve installed Insteon after construction, scenes typically take on a different purpose. Why? Two reasons: first, in more modest homes you aren’t likely to have 14 different sets of lights in one location (such as a kitchen having a separate circuit for the can lights, overhead pendant lights, in-cabinet lights, under-cabinet lights, over-cabinet lights, etc.). Second, since the house was built with traditional switches it’s likely that various “paths” were already thought of in advance with the existing wiring. For example, the Crestron home I’ve seen had a very large second-floor hallway and landing area which had two separate circuits for each half of the hallway. A scene was used to turn on both halves at once, but technically they could be operated independently with different switches. With a more modest home you’d likely just have a single circuit powering the entire hallway anyway, so there’d be no need to create a scene to control both sets of lights at once.

Why do you need to use scenes?
So does that mean we don’t need to worry about scenes? No, it just means that you likely won’t be using scenes in the way that you usually read about (controlling multiple lights at once to create an actual “scene”). Instead, you’ll be using scenes to control multiple switches at once. In other words, while you often won’t need a single switch to control multiple lights, it’s much more likely that you’ll control a single light with multiple switches. Your house will have 2-way and 3-way switches all over the place (such as a light switch on each end of a hallway, or one at each of the 3 entrances to your living room). As we discussed in the past, with Insteon, there is no longer a one-to-one relationship between switches and the lights they operate. So while one switch will carry the “load”, actually connecting the power from the street to the lights themselves, the others in these multi-way switches will simply communicate with that load-bearing switch the respective commands such as on, off, or dim. For this you’ll use scenes, which are basically a level of abstraction that you should understand. Instead of thinking about the switch at one end of a hallway communicating with the switch at the other end to turn the lights on, you should think of either switch telling the “system” to turn a “scene” on and off, and the other switch simply responding to the state of that scene.

How do scenes work?
The key thing to understand here is that in the context of Insteon there are devices and there are scenes. Each device can be a controller, a responder, or both. Insteon switches are both because they not only control things by sending signals, they also respond to things by illuminating the LEDs on the switch itself to show their status. Motion Sensors on only controllers because they don’t receive any commands, and the Insteon 8-watt light bulb is only a responder because it doesn’t actually offer any “inputs” like a switch does, so it can’t control anything.

In the ISY-994i, devices that are both controllers and responders show up red, and devices that are only responders show up black. The interface also shows you which scenes the device controls and responds to:
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