automatic switch set by time simulink

Hello, i have a simulink model for small building distribution system, include PV and PU system. Is there any switching method in the matlab simulink, where can automatically trigger/choose from 2 inputs, 1 output and it driven by time (24hour period)?. For example; at time 9am-3pm, switch in A connection; at time 3.01pm-8.59am, switch in B connection. please help..

Answer 1

[Sebastian Castro]

You can

• Use a Clock block to get the simulation time
• Use a Math Function block to get the modulo, so time wraps to zero for a new day
• Use an Interval Test block to check whether you are in the range 9 am - 3 pm
• Feed that logical signal to your switch

For example, check this screenshot:

- Sebastian

[Youri Miessen]

But what if the stepsize is large (f.e. when you are simulating a whole year) and the modulo misses the exact point where it would wrap to zero for a new day?