YS-150 regulator cascade control parameter settings
Thread Content
The reaction vessel is heated by steam, and the temperature is controlled using a cascade control system for the steam control valve, which regulates both temperature and steam pressure. At first, everything was normal. Recently, the device was modified to be more energy-efficient; instead of using steam from the power plant, it now uses waste heat steam for heating. However, the pressure of the waste heat varies significantly, and as a result, the regulator responds too slowly, causing large temperature fluctuations. I want to adjust the parameters of the regulator, but I’m not sure which settings to change. According to the manual, there are four sets of parameters: PID1, PID2, STC1, and STC2. I searched this website for many posts on this topic, but none of them were detailed enough. This device is very important; one cannot stop the vehicle casually, so I dare not make any adjustments without caution. I hope experienced friends can provide detailed information. Additionally, the lamp tube of this regulator is severely aged, and the manufacturer has stopped producing it; the 100 series cannot be supplied with such lamp tubes. I was wondering if there are other manufacturers that produce these types of lamp tubes? Thank you.
I haven’t used this regulator either, so I’ll give you some suggestions on how to adjust it. 1. Adjust the pressure first, then adjust the temperature. 2. Record the original regulator setting value. 3. Have the process technician back you up (work skills): lol 4. If pid1 and pid2 don’t match, try adjusting P on a small scale first; this should resolve the issue right away, but the adjustment range must be small. 5. If control is lost or oscillation occurs during adjustment, don’t panic; immediately switch to manual mode, disable the cascade control, and then restore the original settings to continue adjusting. 6. After adjusting P again, if the results are not satisfactory, I can be added for further optimization. Be careful to stop at the right time and avoid making excessive adjustments that could cause oscillations.