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ESIE05-07 Functional Control for a Standalone Unit
Part 2 – Functional Description 2–19
3
2
4
5
1
Loadup/down
management
Loadup/down management for Stepless screw compr:
Each stepless screw compressor can go stepless from 30% to 100%
The actual compressor capacity is calculated based on the feedbacksignal of the potentio meter.
Determination of circuit capacity is done each software loop.
Name Full name & Description Default
ComprCap(%) Compressor capacity:
Calculated based on the input of the feedback signal of
the potentio meter.
Calculated
AIComprCap(Ohm) Compressor capacity:
Based on read out value of the analog input of the feed-
back signal of the potentio meter, the resistance is cal-
culated.
Calculated
PotMin(Ohm) Potentiometer value in Ohm that is equal to minimum
compr cap of unit default: 12%.
Calculated
Pot88Startup(Ohm) Potentiometer value in Ohm that is equal to reach
100% starting from 12% at each startup.
90 Ohm
Pot88 (Ohm) Potentiometer value in Ohm that is equal to reach
100% starting from 12%.
At load default Pot88 = Pot88Startup
Calculated
12 sec (Sampling)
10 sec
10 sec
Closed
Open
Time [s]
Closed
Open
Closed
Open
Closed
Open
loaddown
loaddown
loadup
loadup
Outputs
Loadup 10s
Loadup 5s
Loadup 5s
Loadup 10s
5 sec
5 sec
ESIE05-07.book Page 19 Wednesday, October 11, 2006 10:42 AM

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