Brochure

It is well known and documented that
control loop performance has an
impact on plant performance and
hence profitability. If the variability
within the process is too high it can
lead to scrap, downgrading of product
or rework. Often the solution is to
move the operating point outside of
the most profitable area, even to run
the process in manual. This can lead to
higher than necessary energy or raw
material costs and you may be produc-
ing a product that exceeds specifica-
tion by a wide margin.
Control loop performance naturally
degrades over time and a great deal of
money is spent maintaining equip-
ment and tuning loops to ensure vari-
ability is kept to a minimum. Many
companies have invested heavily in
advanced process control and auto
tune functions to improve perform-
ance. The problem is that these solu-
tions focus on DCS controller func-
tions and do not take into considera-
tion the deterioration in field equip-
ment where the underlying problem
exists.
Control loop performance