TIDA-00961: Tida-00961

Mohankumar Rajendran

Part Number: TIDA-00961

Hi,

I am running system in current loop(i.e INC_BUILD=2), when i am changing "uspwmEnable" variable in expresstion window from 0 to 1(it means when i am starting switching) ''ocp_fault" variable is setting high but i am probing for input current it is not going beyond the thresold value Then i went through the code where the variable is setting

if((PWM_TRIP_STATUS(LOW_FREQ_PWM_BASE)&LOW_FREQ_PWM_DCBEVT1) != 0)
{
crossoverState=crossoverState_default;
if(boardStatus==boardStatus_NoFault)
{
guiVrmsEMAvg=0;
}
ocp_Fault = 1;
boardStatus=boardStatus_OverCurrentTrip;
}

This is the function. then i got digital compare B event 1 flag is setting(DCBEVT1). can you please help why this flag is setting

thanks

Yashwanth

over 4 years ago

0 Huixin Wang over 4 years ago

TI__Intellectual 940 points

thanks for your interest in our design. our expert will come back to you in business day. thanks for your understanding.

regards

0 Mohankumar Rajendran over 4 years ago in reply to Huixin Wang

Intellectual 380 points

Hi,

please help me in this ASAP.

Thanks

yashwanth

0 Manish Bhardwaj over 4 years ago in reply to Mohankumar Rajendran

TI__Mastermind 43730 points

The bit reflects that the CMPSS saw an over current condition from the board.

Is this a new board you built ? has the board been tested previously?

0 Mohankumar Rajendran over 4 years ago in reply to Manish Bhardwaj

Intellectual 380 points

Hi,

we are using TIDA-00961 board only. I tested in open loop(INC_BUILD=1). I am measuring input current using current probes it is not more than threshold value. I am loading only 20% when i am starting switching(it means when i am enabling uspwmEnable flag from expression window ) ocp_fault flag is setting high.

Thanks

Yashwanth

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TIDA-00961: Tida-00961