I checked around in the modbus register list and didnt see any Modbus schedule registers, I’ll add it to the list. However, I can put a plug in for doing your integration with Bacnet if that’s an option for you. Integrating will go a lot quicker than poring through the list of modbus registers.
Here’s how you can view the Bacnet objects using a standard Bacnet tool called Yabe. You can access it from the T3000 application. Assuming your environment supports schedules you will be able to manage the schedules like any other Bacnet object.
And here is how you can access the schedules from within our T3000 application directly. The source code for this application is on Github if you care to poke around.