YOKOGAWA F3CU04-0S, User Manual

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D1-1
IM 34M06H62-02E 3rd Edition : Jul.16, 2015-00
D1. Before Performing Checks
This module acts on SP (set point) and PV (process value) input and performs
control and computation to output a computation result, forming a closed loop.
Therefore, any improper control parameter or input/output setup may result in
control problems, such as unstable input or no output. If you encounter these
problems, follow the troubleshooting steps given below for a specific problem and
correct any inappropriate connection or setup. For details on the errors that are
detected by the self-diagnosis function and how to recover from a detected error,
see Section C10, "Self-diagnosis Function." For details on register and relay
positions, see PART-E, "Relays and Registers."
The module stores many preset values internally. Sometimes, temporary preset
values are written for testing purposes, such as during trial runs and program
debugging, and are left uncorrected. They are stored in the module, even after
power off. Such unintentional preset values may result in unexpected operations
subsequently. If replacing a module solves a problem, it is highly likely that the
replaced module has some invalid stored preset values. In this case, we
recommend that you check all preset values. Alternatively, initialize all preset
values to their default (factory setting) and then change individual preset values as
required, and check for correct operation. For details on how to initialize all preset
values, see Section B2.5, “Initializing All Settings."
TIP
For efficient setup and monitoring of the module, we recommend that you use the Toolbox for
Temperature Control and Monitoring Modules and the Advanced Function Module Register Monitor of
WideField3.