Figure 8-17: PID Function Block Steam Heater Control
A. Steam supply
B. Steam heater
C. Condensate
Solution
The PID loop uses TT101 as an input and provides a signal to the analog output
TCV101. The BKCAL_OUT of the AO block and the BKCAL_IN of the PID block
communicate the status and quality of information being passed between the
blocks. The status indication shows that communications is functioning, and the
I/O is working properly. Figure 8-18 illustrates the correct function block
configuration.
Figure 8-18: PID Function Block for Steam Heater Control Example
A. Outlet temperature input
B. AI function block
C. PID function block
D. AO function block
E. Out
F. In
Manual FOUNDATION
™
Fieldbus
00809-0500-4880 December 2022
Rosemount OCX8800A 185
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