Siemens PLC control

2016-07-21View Original

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When the valve is opened to 100%, the milliampere value is only 18; all other opening levels show normal values. Why is that?

Reply #22016-07-21

Is the milliampere value you’re looking at from the locator? If that’s the case, it’s usually sufficient to re-verify it. If it’s a PLC-controlled valve, is it pneumatically controlled or electrically controlled? Take a photo

Reply #32016-07-22

Pneumatic control; the reading obtained after it comes out of the card holder is only 18 milliamps

Reply #42016-07-22

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Reply #52016-07-25

Then you will need to retune the valve positioner

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Siemens PLC control

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