CnReach First Time Setup

This is my first time setting up a CnReach system. I'm having trouble using digital inputs and outputs. I have a switch on my AP CnReach on channel 4 and a light on channel 4 on the EP CnReach. (These are digital channels) I want to use this switch to activate the light. I am having trouble doing so. Someone said I have to use Modbus for this action, but how do I do that? Any help figuring out my input/output situation would be greatly appreciated! Also, is there a number to call for any furthur help? 

Thanks for the post. I have forwarded this to our support and product teams. You should be hearing from them soon.