MODBUS LITE V5.01 parameter specification

MODBUS parameters "ebm-papst series 84 / 112 / 150 / 200"
_______________________________________________________________________________________
ebm-papst Mulfingen GmbH & Co. KG
Bachmühle 2 ·74673 Mulfingen, Germany ·Phone: [phone] ·Fax: [phone] ·www.ebmpapst.com ·[e-mail]
DocNo.: 634505DocNo.: 446144DocNo.:358982DocNo.:322523DocNo.:309753DocNo.:303997DocNo.:276241DocNo.:256078DocNo.:196392 ·Template: 2 dated 6 October 2003 ·File: ext001157859.doc ·Last printed 10/03/2015 15:13:00
·Page 36 of 70
Form 1003
b) I factor
%100
65536

bytes Data
factorI
This means that values can be set for the I factor between 0 and 100%, in steps of 0.00153%
Remarks concerning control behaviour:
After each scanning cycle time T
a
= 50 ms, the fan's controller computes a new modulation level according to
the equation below:
%................
%...............
..........)(
............)(
)(
%100
)(
%100
)(
0
infactor Iki
infactor Pkp
value) actual - value (set n time at deviation control Normalisednxd
100% >- 65536 i.e. 65536; to 0 range to normalised n, time at level Modulationna
ixd
ki
nxd
kp
na
n
i



The normalised control variable is calculated from the set value and the actual value.
Set value and actual value are also normalised to the maximum speed.
The normalised control equation stated above and the generally applicable control equation
time SamplingTa
time action IntegralTn
gain alProportionkr
value) actual - value (set n time at deviation control AbsolutenXd
)( n time at level ModulationnA
iXd
Tn
Ta
nXdkrnA
n
i
................
................
................
..........)(
100% to0............)(
)()()(
0











... can be converted to each other with
 
value reference Min- value reference Maxkr
Tn
Ta
kiorTa
ki
kp
Tn
value reference Min- value reference Maxkrkpor
value reference Min- value reference Max
kp
kr

 )(
with
msTa 50
[rpm] .....................
0
024,1
speedMaximumnMax
value reference Min
nMax value reference Max

