Regarding plotting response in simulink

My transfer function is G(s) = h(s)/q(s) where h is liquid heght in tank and q is inlet flow rate. while i design pid control for this i will get Height versus time through scope block. Now i need to know how flow rate is changing with respect to time when i give step input to the set point i.e Height of the liquid in the tank. can you tell me how can i obtain this?

[Raj]

Do you want to:

1) Change input as 'Height of liquid' and output as 'flow rate' and with updated transfer function get the step response of the new system?

OR

2) With the present system you want to set an output reference and see how input changes to get the system to the reference point?

[Nagarjuna Arjun]

i will give step input to Height and i want to know how flow rate is changing. i.e point (1) of your comments

[Nikhil Sonavane]

Can you share you model?