Emerson Rosemount OCX8800A Manual page 185

Manual
00809-0500-4880
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.
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
Rosemount OCX8800A
Figure 8-18 illustrates the correct function block
F Fieldbus
™
OUNDATION
December 2022
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