The Generic Device Action, you can use for calling a command on a device. You take this command whenever there is no speical Action (like for example Infrared Action) for the device type.
Choose Generic Device Action as Action Type
Then you have to select the device (equipment that will be controlled with the action) as well as the command ID of the command, which will control the target device. If you define a delay, the action will be executed with the defined delay (specificaton in milliseconds). The parameter context is used only for some internal functionality in the IRControl System.