The communication object is the exclusive means through which devices can communicate with each other on the bus.
Note:
In the followings tables, each flag carries significance for communication objects:
"C" indicates the enabled communication function.
"W" signifies the object value can be modified by the bus.
"R" represents the object value can be read by the bus.
"T" represents the enabled transmission function.
"U" indicates the object value can be updated.