The modules can operate in one of three modes. In Manual Mode one of the input channels is selected. In Average Mode the average value of the 2 inputs is used. In Automatic Mode the either one of the inputs can be selected as the module output. 

The status of each channel is used to disqualify that channel from being used. 

Alarms are generated for HIgh-High, High, Low and Low-Low.

The logic was created in Studio5000 Ver 31 and can be used in older versions of RSLogix5000.