Emerson Rosemount OCX8800A - Page 190

Figure 8-23: Function Block Diagram for Cascade Control with Override
A. Master controller
B. PID function block
C. Out
D. In
E. AO function block
F. Control selector function block
G. AI function block
H. Slave controller
8.9.11
Troubleshooting
Refer to Table 8-27 to troubleshoot any problems that you may encounter.
Table 8-27: Troubleshooting
Symptom Possible causes Corrective action
Mode will not leave OOS. 1. Target mode not set. 1. Set target mode to something
other than OOS.
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Fieldbus Manual
December 2022 00809-0500-4880
190 Emerson.com/Rosemount