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Old April 22nd, 2005, 01:01 PM   #7
Ron Beaufort
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Join Date: Jul 2002
Location: Charleston, SC
Posts: 5,471
in Figure 7 we’ve finally opened the drain valve on our tank ...

so now we no longer have a “sealed system” ... the “load” represented by the water draining away from the tank produces the classic “droop” or position slightly below the setpoint that we normally associate with a Proportional-only controller ... and so instead of the 60% target which we desire, something more along the lines of about 58% is the best that our Proportional-only controller is able to give us ...

2-B ?
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Ron | |
PLC Training Boot Camp - Retired | 2-B |

I once was lost, but now am found, was blind, but now I see.

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