Why integral control mode call Reset controller?
Answer / carl_ellis
The first PI proportional controllers were analog electronic
controllers. On those analog controllers, the integral
adjustment was a front panel rotary knob (or pot) which
adjusted the time constant of the error integrator circuit.
Integration is the mathematical operation on the error
signal in a PI or PID controller. Explaining how it works
as a calculus math function is meaningless to technicians
who haven't studied calculus.
Back then, the integral adjustment was called 'reset'
because the adjusting the knob was said to 'reset' the
process variable's droop back towards the setpoint.
Controllers were frequently recorder/controllers so the
trended PV action could be seen over time - the droop from
setpoint and the resulting reset towards the setpoint when
integral action was applied.
Hence, 'reset' became the term used for integral action
rather than 'integral'.
Carl Ellis
Measure First
Is This Answer Correct ? | 0 Yes | 0 No |
if we have 450 mm heigth boiler drum level ,so what is span & zero value for a dpt tranmitter
In which principles tx ,pressure gauge,Temp gauge,control valve works?
0 Answers Bajaj, Professional Instruments,
Why Ma signal is using for control system?
i have one temperature TX in my loop check time once i was remove elament temp gose maximum then i am conect corectly but still now temp showing maximum what can i do this problem?
what is interface level measurement.who can calibrate interface level measurement transmitter online
how we calculate the range of flow from a dp?i mean if we have a dp,3810mm h2o.how much flow ranges we can use for this DP?
what is diffrence between analog card and digital card in plc.how analog card work,Please explain in detail.Please send it on abhi_vyas@sify.com
please send data bank of quetions answers on analytical instrumentation.
please explain clearly in PID controller if We increase P only what will be action of the contrlere.
can we replace a pressure transmitter of range 0 to 25 Kg/cm2 by a Pressure transmitter of range 0 to 10 Kg/cm2 ?.. Will it affect 4 to 20 mA output signal which we will feed to the PLC.
Boiler flame scanner working principle?
hello this is dhinakar i am completed my instrumentation engg . recently i got job in sugar industry side. i like to ask one question can any one say what are the things i have to follow know more about industrial instrumentation,,,,,,,