I/O line passing

Line passing allows you to affect the output pins of one device by sampling the I/O pins of another. To support line passing, you must configure a device to generate I/O sample data using periodic sampling (IR (Sample Rate)) and/or change detection (IC (DIO Change Detect)). 

On the device that receives I/O samples, enable line passing setting IA (I/O Input Address) with the address of the device that has the appropriate inputs enabled. This effectively binds the outputs to a particular device’s input. This does not affect the ability of the device to receive I/O line data from other devices—only its ability to update enabled outputs. Set IA to 0xFFFF (broadcast address) to affect the output using input data from any device on the network.