Siemens positioner
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I would like to ask everyone: On the DCS screen of the Siemens positioner, the output is shown as 100%, but the feedback shows 94.7%. How should this be adjusted? Thank you!
There are no characters on the screen in the second picture; are there actually characters there?
This post was last edited by hby1224 on 2018-9-12 at 22:26; something was wrong and the power supply turned it off
Oh, is that valve of Akka’s, right? Is there an alarm for valve position deviation after power is applied?
Is it possible that the output channel of the DCS card is out of spec, causing the current received at the actual site to be less than 100%, and as a result the feedback value is also not 100%. It’s just a guess, huh
It’s likely that the valve isn’t open fully. First, check whether the air supply pressure is sufficient; if it is, perform self-tuning.
Most common problems with control valves. Given 100. The feedback is only 94; firstly, the valve isn’t fully open – check if it’s stuck. Second, the feedback rod is loose; after checking it, no issues were found, so an initialization process was sufficient to resolve the problem. There’s no need to tell you it’s the fourth item; just long-press the plus sign
The valve isn’t fully open; check whether the air supply pressure is sufficient, and usually the issue can be resolved after the locator performs an automatic calibration.
It is necessary to determine whether the actual position of the valve is already at 100% or 94.7%