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The function of Fuzzy Logic is to adjust PID parameters internally in order to make
manipulation output value MV more flexible and adaptive to various processes.PID + Fuzzy Control
has been proven to be an efficient method to improve the control stability as shown by the
comparison of curves shown below.
Figure 1-2.PID System Stability with and without Fuzzy
The Fuzzy Rule works like the below.
If temperature difference is large and temperature rate is large, then MV is large.
If temperature difference is high and temperature rate is small, then MV is small.
By using proprietary Fuzzy modified PID technology the control loop will minimize the
overshoot and undershoot in a shortest time.
This Process Control Card can be configured as a single set point controller (static mode)
or a ramp and dwell profiling controller (profile mode). The profile mode feature allows the user to
program up to 50 profiles with up to 32 free format Segments (ramp, dwell, jump or end) each. The
total segments available for the product are 1000 segments.
The Process Control Card contains the following features.
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