There is nothing in the ZW-L manual that describes any of those special functions like Fast Bell or Horn.
Frankly, what is built into the ZW-L is not actually PowerMasters, although for the price $900 or more they should be. What is inside is some circuitry that allows voltage control to the track using a CAB1, 1L or CAB2. None of the functions of a Legacy PowerMaster or TPC 300/400 are there.