Micromod MOD: Modcell 2050R Users Guide - Manual (Page 165)

IB-23C650
TUNING
Table 13. Autotune Procedure
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Entry Description
**MENU** Installation and Setup Check. Installation,
and Setup must be completed before executing
auto tune. Note the following:
• Output limits are applied during autotune
execution.
• Digital input must be set at [ none ] or not
enabled to use autotune.
• Correct control action is essential for
successful autotune execution.
Control Action Check. Check that control
action (direct or reverse) is properly defined for
the application.
Operating Mode. If automatic mode is
selected, advance to auto tune activation. The
output and process values must be as stable
as possible before activating.
xxx
Process
Value
xx
Set-Point
Value
None
xxx
Process
Value
xx
Output
Value
Ramping the output should be slow enough to
allow process response to the change without
overshooting the set-point.
Make Process Available. If necessary open
block valve ahead of control valve or perform
any other procedure required to make the
process available, such as starting a pump,
turning on a power supply, etc.
Set Final Output Value. With control in
manual, use UP, DN to adjust output to bring
process value to the normal operating set-
point. The closer the process is to the set-
point, the more effective the autotune cycle will
be.
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