Posted 12 Jun 2020 Hi, could anyone help? On C+9 PIDAT parameter settings, what's the difference between the values of 0 and 1 in the bit 15 of C + 9? When I try 0 or 1, PID constants remain at the initial values that I made before, the auto tuning doesn't work. Thanks Share this post Link to post Share on other sites
Posted 15 Jun 2020 Try a momentary action to turn it ON using a SET instruction for C+9, Bit 15. The PIDAT instruction will automatically turn it OFF when auto-tuning is complete. It may take some time. Share this post Link to post Share on other sites
Posted 15 Jun 2020 Whether the process should be on hold till the completion of auto-tuning? Minimum how much time it may take to complete auto-tuning ? Share this post Link to post Share on other sites
Posted 16 Jun 2020 16 hours ago, Abdul Wajid said: Whether the process should be on hold till the completion of auto-tuning? The manual states, "The changes in the SV will not be reflected while autotuning is being performed." The process is being exercised during AT. 17 hours ago, Abdul Wajid said: Minimum how much time it may take to complete auto-tuning ? I'm not sure. I'm not a PIDAT expert and it's been a while since I've used it. It would probably be dependent on the sampling period. Also it will not complete if there is an error. Try monitoring P_ER contact directly after the PIDAT instruction. The "Instruction Help" section has limited information. Please look at the details in the Instruction Reference manual. It explains more. Share this post Link to post Share on other sites