User fault – Generates a user fault

The User fault block is used to stop the converter operation from the user model. It makes the controller enters the FAULT state (user fault) and PWM outputs are blocked when the block input signal is larger than 0. The controller goes back to BLOCKED state when the input signal is smaller or equal to 0.

As further explained in Programming and operating imperix controllers, the different controller states (aka Core states) are:

Unlike the other sources of fault, the user fault is generated from the user code. When a user fault is triggered, a red banner appears in Cockpit and a user-defined message is shown in the log module:

Simulink block

Signal specification

• The input signal is a trigger signal. A user fault is generated as soon as the input signal is strictly larger than zero. The user fault is cleared when the input signal falls back to zero.

Parameters

• Displayed message is the message that is displayed in the Cockpit logs when the user fault is triggered. If multiple User fault blocks trigger a fault, only the message of the first block to trigger the fault is displayed.

PLECS block

Signal specification

• The input signal is a trigger signal. A user fault is generated as soon as the input signal is strictly larger than zero. The user fault is cleared when the input signal falls back to zero.

Parameters

• Displayed message is the message that is displayed in the Cockpit logs when the user fault is triggered. If multiple User fault blocks trigger a fault, only the message of the first block to trigger the fault is displayed.

C++ functions

When using CPP SDK, if the user interrupt returns UNSAFE, a user fault is automatically triggered. For example, the following code triggers a user fault if the measured voltage exceeds a defined threshold:

float V_max  = 800.0;
float V_meas = 0.0;
boolean user_fault = false;

tUserSafe UserInterrupt1(void)
{
    //...
    if(V_meas > V_max){
        user_fault = true;
    }
    //...

    if(user_fault)
        return UNSAFE;
    else
        return SAFE;
}Code language: C++ (cpp)