Proportional Integral Derivative (Pid) Block With Auto Tune; Figure 14: Pid Block; Figure 15: Pid Block Schematic Diagram - Honeywell SLG 700 Option Manual

3.10 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 14: PID Block

Figure 15: PID Block Schematic Diagram

Page 76 FOUNDATION Fieldbus Option User's Manual Rev.5