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Application Setup – Section 7, Page 33
4.
Before beginning configuration, consider how the controller will be used in your
application. For instance, how many control loops are needed, is cascade or ratio control
required, will the unit control a valve motor, do you need setpoint profiling etc.
Consideration should also be given to the output types, alarms and tuning method.
Pre-commissioning Considerations
An easy Setup Wizard is available for basic applications (see page 42) where the most
commonly required parameters are present for adjustment in turn. The wizard has a sub-
set of the full configuration menu options. For more complex applications where the
wizard is not sufficient, consideration must be given to the following fundamental
questions:
If fitted, how will the 2nd input be used?
• One loop only (if the 2nd input not fitted or not used in this application)
• Two independent control loops (see page 49).
• Valve feedback for loop 1 (see page 87).
• A "redundant" backup for the 1st input (see page 85).
• Cascaded with the first control loop (see page 80).
• A reference input for ratio control (see page 83).
How will the instrument physically control the process?
• Primary only or primary & secondary control outputs (see page 212).
• Direct valve motor drive outputs (TPSC, Three Position Step Control) (see page 86).
Which outputs will be used for control, and are alarms or event outputs needed?
• Output configuration (see page 56).
• Alarms & Profile Events (see page Alarm Types 208 & 226).
What are the sources for the setpoints?
• Local setpoint(s) only, or a remote setpoint input (see page 217& 228).
• Profile Control (see page 89).
Is Input re-configuration required?
• Analog input calibration & scaling (see page 73).
• Digital input functions (see page 77).
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