Page 54 Foundation Fieldbus RMA803 Remote Indicator User's Guide Revision 4
5.6 Proportional Integral Derivative (PID) block with auto tune
The PID block is the key to many control schemes, and it is commonly used. The PID function
integrates the errors. If there is difference in process time constants of a primary process and
secondary process measurement, then the block can be cascaded if required. Auto tuning is a feature
that tunes the PID constants as per the process automatically.
Figure 10: PID block
Figure 11: PID block schematic diagram
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