PCV % opening not same with % displayed on Vijeo Citect

IdealDan · Nov 17, 2019

Hi Friends,

A quick one please:

Today, I observed a PCV in my Process with 4% open (LOCALLY) and displays 96% open on Vijeo Citect SCADA.

I suspect a design error on the numeric display object which I intend checking it tomorrow.

I'm just wondering if there could be other possibilities? Please what's your opinion?

Thanks in advance.

mp91 · Nov 17, 2019

There could be literally hundreds of other reasons. Sounds like you are looking at closed vs open or vice versa. Could be as simple as subtracting it from 1.

Wasan · Nov 17, 2019

Please show us what configuration that you use on Citect so we can check them.

IdealDan · Nov 18, 2019

mp91 said:
There could be literally hundreds of other reasons. Sounds like you are looking at closed vs open or vice versa. Could be as simple as subtracting it from 1.

Hi mp91,

Could you please explain a bit further what and how to do this?

Thanks in advance

IdealDan · Nov 18, 2019

Wasan said:
Please show us what configuration that you use on Citect so we can check them.

ok, I will do that this morning

Regards

IdealDan · Nov 18, 2019

Someone told me to change the PID Control Action on the PLC5/30 from DIRECT ACTING (PV-SP) to REVERSE ACTING (SP-PV), which I doubt won't resolve this.
Guys what do you think please?

Thanks in advance.

IdealDan · Nov 18, 2019

Hi Guys,

Please, here are some screen shots.

Your inputs will be appreciated.

Thanks in advance

PCV % opening not same with % displayed on Vijeo Citect

IdealDan

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mp91

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Wasan

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IdealDan

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IdealDan

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IdealDan

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IdealDan

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