A special carillon computer regulates the solenoid hammers. More than 1000 melodies can be stored on a changeable memory module. The computer can be programmed a year in advance, allowing for playing of those melodies at desired times throughout the year. Automatic reset for Summer and Winter time, as well accuracy of the time, is done by a radiographic receiver device. All playing functions can be easily programmed from a clearly visible panel of the Carillon Computer.

At selected time functions, the chime shall strike the time and/or play a melody that was chosen. The Petit & Fritsen computer programs store the requested melodies in the memory of a micro processor.