Questions about PID control and logs

Hello, I'm working on control of copters use pixhawk.

I want to get the data about the input and output of the PID controller. 

But from the pixhawk log files, I can not find the parameters I need.

Sometimes I can see PIDA_lable, PIDP_lable, PIDR_lable, PIDS_lable, PIDY_lable, but there are no specific data. Sometimes I even can't get the parameters(PIDA_lable, PIDP_lable, PIDR_lable, PIDS_lable, PIDY_lable) at all.

So, I don't know why, how can I get full parameters of PID? Can anyone help me? 

Thanks a lot.

QQ截图20151015100901.png

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