Answer Posted / abu maryam
scanning time:
In general: scanning time: it is the time taken to read all inputs then execute the program and apply on outputs.
In PLC: it is only 1 processor check the previous procedures so its scan time depend on the quantity of data and program.
In DCS: There are several processors each processor has its inputs and outputs and its private program so each processor in DCS has its private scan time applied on each loop.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
How does your previous experience relate to the job you are applying for ?
Do you have reference list?
Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com
how to rectify the poor signal strength in utrasonic digtial flow meter ,model:ge digital xce868i
how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw
How u measure the massflow in orifice flow measurement techniques
How to Calibrate Vibration Probe (Axial, Redial) in field
you are on site,the plant trips,you are approached by operations,what do you do?
What is heating effect?
what is the input of digital counter during the the calibration time?
when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?
How to calibrate the flow transmitter
Programmable Logic control.
why we use cascade control and feed forward control in 3 element drum level control measurement of steam drum .what is cascade and feed forward control system ?give example .
How we connect a instrument with ground, Give brief explanation with help of diagram?