Seek the Chinese validation manual for the Foxvalve Logix420 positioner
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This post was last edited by ζ Classmate Jian Huang ℡ on 2018-2-8 at 13:41. By the way, I would like to ask those with more experience: What fault causes the valve stem of this positioner valve to move back and forth between the maximum and minimum positions when it is in automatic mode? It is a air-operated shut-off valve; if you have any relevant information, please contact me or send it to my QQ. Thank you
I have only used Logix3200 and Logix520! Do you mean the valve moves directly back and forth between fully open and fully closed positions?
It’s possible that the action and reaction forces weren’t set correctly; I’m just guessing, as I’ve never used it either