Configuration, Startup, and Operation
of Recorder with Display
4/00 DR4300 Circular Chart Recorder Product Manual 99
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
MINRPM
RPM
MIN [factory setting]
MINUTES PER REPEAT or REPEATS PER MINUTE—
Use this parameter to choose whether you want to
specify the integral term (reset) in the PIDA algorithm in
terms of length (minutes per repeat) or frequency
(repeats per minute). Your choice here affects which
tuning prompt, “I MIN” or “I RPM”, is displayed.
The relationship between the two ways of thinking about
reset is demonstrated by this example:
20 repeats per minute = 0.05 minutes per repeat.
This parameter is displayed only if the “CTRALG” (control
algorithm) is set to “PIDA”.
ATTENTION
If the setting of MINRPM is changed,
you must change the value of the associated tuning
parameter (“I MIN” or “I RPM”) if you want to maintain the
same control action. For example, suppose MINRPM = I
RPM and the value of tuning parameter “I RPM” = 2. If
you change MINRPM to I MIN, the value of “I MIN” will
now be 2 (the value formerly assigned to “I RPM”). If you
want the same control action you had before, you must
change the value of “I MIN” to 0.5.
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