Eaton TC 48, Руководство пользователя

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You can use the program for the new process or directly
set the appropriate values for PB, TI & TD according to experience.
If the control behavior is still inadequate, then use
to improve the control. See for manual tuning.
Adjustment of CPB is related to the cooling media used. For air
used as cooling media, adjust CPB at 100(%).For oil used as cooling
media, adjust CPB at 125(%). For water used as cooling media,
adjust CPB at 250(%).
DB Programming: Adjustment of DB is dependent on the system
requirements. If more positive value of DB ( greater dead band ) is
used, an unwanted cooling action can be avoided but an excessive
overshoot over the set point will occur. If more negative value of
DB ( greater overlap ) is used, an excessive overshoot over the set
point can be minimized but an unwanted cooling action will occur.
It is adjustable in the range -36.0% to 36.0 % of PB. A negative DB
value shows an overlap area over which both outputs are active. A
positive DB value shows a dead band area over which neither DB Programming:
Output 2 ON-OFF Control ( Alarm function ): Output 2 can also be
configured as alarm function. There are 4 alarm functions that can
be selected for output 2: DE.HI (deviation high alarm ),
DE.LO (deviation low alarm ), PV.HI (process high alarm ) and PV.LO
( process low alarm ). Refer to Figure 3.3 and Figure 3.4 for the
description of deviation alarm and process alarm. Output 2 ON-OFF Control ( Alarm function ):
DE.HI
DE.LO PV.HI PV.LO
Figure 3.3 Figure 3.4
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