i am working in the automation company...i want to just know
how actully pid control valves are tune????...
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Answer Posted / sumith
PID control valves works on 4-20 ma ,plc gives 4-20 ma to
pid valve according to the difference between setpoint and
actual value (for e.g s.p temp = 90 degc actual = 30
degc)now plc will give 20ma to pid valve for temp to reach
the setpoint.pid valve should have continous air supply.
to calibrate pid valve there is span and zero adjustment.
pid tuning is done in plc not in valve.pid tuning in plc is
trial and error type tuning.
we have to some values in P and I and D and check whether it
is reaching the setpoint smoothly
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I am teja. I am studying Msc(tech) Electronics and Instrumentation (3years course) in Andhra university. But my course is not recognised by UGC and AICTE. Please tell me the job opportunities after this course. And i fineshed PLC course in IGIAT ,Vizag.Also complted my short term coure in SCADA, Seimans WinCC in ATI,Hyd.After Msc can i join Mtech for good job? or phd. How i can get good job in INdustrial Automation Side. Please give replay.Because this is my life matter.
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