The Software driver runs as a web server with password protection for increased security. Users can select the Schedules from a pre-engineered list, choose new weekly schedules or additional exceptions manually or from templates. The data is then written to the the BACnet devices. The solution means multiple schedules can be modified from one action. Lists of schedules and exceptions are represented as buildings and areas that can be selected. Graphical representation of weekly schedules or date bases exceptions can be added, deleted and modified. Once written the user is presented with a list of the devices and the results. Related users can be emailed with notification of the changes.