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from the Operations department...
Mark V, CNTS
Human-Machine Interface and SCADA. topic
Posted by Dexter Caeiro on 23 November, 2007 - 11:29 am
Hello,
Our company is presently using a 36MW STG which has MarkV controls. We normally do a manual startup wherein all the rolling commands are given by us. There is a provision for auto startup but has not been used. I am now trying to decipher this startup sequence from the rungs. However I am stuck at one point where the hold times have been specified in CNTS. Something like 0.9500 CNTS. The unit in the scale.dat has a gain of one and a factor of zero. Can anyone help me by telling me a way of converting this to seconds or minutes?

Any help appreciated

Thanks


Posted by CSA on 25 November, 2007 - 6:22 pm
Hello, I'm going to guess that the value 0.9500 is used to MULTiply another value, in essence reducing the value to 95% of its original value.

The AutoStart sequencing can be quite convoluted; it often looks at metal temperatures and makes "adjustments" to various paramaters. For example, if a bowl temperature is above a certain value it will reduce the hold time by some amount on the assumption that the unit is warm.

But, without being able to look at the CSP for the unit, it's very difficult to comment with any degree of certainty.

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