MCE2035: User manual
Version: 2011-05-17, rev.: 0a Page: 11
5.3 Measurement time
By use of DIP-switches it is possible to choose between 4 different measurement times. All
load cells are sampled/averaged over a measurement period determined by Sw1.1 and Sw1.2
as follows:
SW1.1
SW1.2 Measurement time
OFF OFF 20 ms
OFF ON 100 ms
ON OFF 400 ms
ON ON 2000 ms
NOTE: Upon default delivery SW1.1 is OFF and SW1.2 is ON, so that 100ms measuring time is achieved.
The hereby found load cell signals (possibly filtered) are used in the Profibus-DP communica-
tion until new signals are achieved when the next sample period expires.
5.4 Filtering
By use of DIP-switches it is possible to include one of 3 different FIR filters, which will be
used to filter the load cell signals. Thus it is possible, to send the unfiltered load cell sig-
nals achieved over the selected measurement period through one of the following FIR fil-
ters, before the results are transmitted on the Profibus:
Frequency
SW1.4 SW1.3 No. Taps
Tavg
20ms
Tavg
100ms
Tavg
400ms
Tavg
2000ms
Damping
OFF OFF 0 -
- - - -
-
ON OFF 1 9
12.0 Hz 2.4 Hz 0.6 Hz 0.12 Hz
-80dB
OFF ON 2 21
6.0 Hz 1.2 Hz 0.3 Hz 0.06 Hz
-80dB
ON ON 3 85
1.5 Hz 0.3 Hz 0.075Hz 0.015Hz
-80dB
NOTE: With both switches OFF, which is default setting upon delivery, no filtering is performed.
5.5 Scaling
By use of a DIP-switch it is possible to select the desired scaling of the weight signals. The
scaling of the weight signals on the Profibus is determined by Sw2.1 as follows, where the
table shows how a given weight is represented on the Profibus depending on switch and
jumper settings:
JU7 = OFF
(32 bit signed integer)
(normal default delivery)
JU7 = ON
(IEEE754 floating point)
Weight
[gram]
Sw2.1 = OFF
(1 gram)
Sw2.1 = ON
(1/10 gram)
Sw2.1 = OFF
(1 gram)
Sw2.1 = ON
(1/10 gram)
1,0 1 10 1,000 10,000
123,4 123 1234 123,000 1234,000
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