32
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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Summary of Contents for TC 24
Page 1: ...R R www comoso com...
Page 30: ...SP1 SP1 O1HY ON OFF OUT1 Action PV Dead band O1HY Time Time 30 www comoso com...
Page 31: ...Cool only control Cool only control 31 www comoso com...
Page 36: ...3 6 Ramp 3 6 Ramp 36 www comoso com...
Page 43: ...43 www comoso com...
Page 44: ...44 www comoso com...
Page 46: ...Chapter 5 Specifications Chapter 5 Specifications 46 www comoso com...
Page 47: ...47 www comoso com...
Page 48: ...Resolution Resolution 48 www comoso com...
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Page 54: ...www comoso com...
