164 •
••
• 9 - PID Loops Simatic 505 SoftShop
Figure 9.6
Now enter each appropriate variable for the autotune process. The
following section describes, in general terms, each variable and the PID
autotune process for a temperature control loop.
Caution
SmarTune should not be used if a process might experience
harmful effects as a result of arbitrary M
n
assignment. During a
tuning session, M
n
values are assigned in such a way as to
determine the frequency response of a process. The tuning process
may result in process product that does not meet required
standards. This product may need to be purged before and/or after
a tuning session. Ensure that your process is designed to handle
the results of loop tuning
.
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