Deif GPC-3 Hydro, Справочник дизайнера

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P regulator
0
20
40
60
80
100
0 10 20 30 40 50 60
Kp
O
u
tp
u
t
(%
)
4 %
2 %
1 %
0.5 %
In this example we have a 2 % regulation deviation and an adjusted value of the Kp = 20. The calculated
regulator value of the unit is 40 %. Now the pulse length can be calculated with a period time = 2500 ms:
ms
t e
PERIOD DEVIATION
1000 2500 * 100 / 40
* 100 /

The length of the period time will never be shorter than the adjusted ON time.
Settings related to relay control
Setting Description
2601 “GOV ON time” The minimum length of the relay pulse. The relays will never be activated for a
shorter time than the GOV ON time.
2602 “GOV period time” The time between the beginning of two subsequent relay pulses.
2603 “GOV increase” Relay output for GOV up command.
2604 “GOV decrease” Relay output for GOV down command.
2605 “GOV ON time test” Test function for the minimum pulse length (GOV ON time).
In addition to these settings, the Kp and deadband for the relevant controllers must be adjus-
ted as well.
GPC-3 DRH 4189340587 UK PID controller
DEIF A/S Page 110 of 122