Siemens valve position feedback
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The Siemens intelligent positioner shows that the output valve position is 40%, while the valve position feedback value is 41.2%. Why is there such a discrepancy? Why don’t the output valve position and the feedback valve position match? Solve
It is normal to have some error; if you think it’s too large, you can initialize and recalibrate it
“It’s normal for there to be deviations in the case of \"ten times out of nine it’s not accurate\"; if the deviation is too large, recalibration can be performed.
It’s normal to have deviations; they can be corrected again
Is the valve position feedback a separate unit or one built into the actuator? If it’s a separate unit, it can be adjusted so that its value matches that of the actuator. If you think there is a problem with the actuator, then re-calibrate it. Generally, Siemens actuators do not have very high precision, and physical factors related to the valve itself may also cause deviations.