I can see in the model based design toolbox for MPC5744P in Simulink the integrator blocks without the reset input option.
Can you make an update to include the integrator blocks with the reset input?
Have you tried to use the standard Simulink Discrete PID Controller ?
That block can be configured exactly as you have suggested - integrator with reset option.
To achieve this you have to:
1. select the Controller type as: I
2. select the appropriate integrator method
3. enable the External reset option
Can you check on your side if this approach will address your use-case. If not, then we can add a feature request to add the capability on the AMMCLIB block to do this as well.