USER HANDBOOK 2.0 | DC20XX, ET20XX, ECC21XX SLIM
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
Dialog-Controller-DC20XX_EN.docx
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Data from analogue inputs
Data from analogue inputs
Feature
Value
Description
Cable length
max. 30 m
Only valid for unshielded connection cables
Cables over 30 m in length must be shielded
Modulation method
Delta-sigma modulation
–
Shared points between
the channels
AGND reference
ground
–
Clamp arrangement
Shielding on common
AGND pins
–
Sampling duration/rate
for measuring values
1 ms
A reading is taken from each input channel every
millisecond, regardless of how many channels are
actually in operation.
Sampling rate
Operating mode AI-PT
250 ms
In operating mode AI-PT, calculations are carried
out after the millisecond sampling rate. A new
value is available in the user program every
250 ms.
Digital filtering
Possible
filter settings
Time range for averaging
Time range for averaging
Operating mode AI-PT
0
1 ms
0.25 s
10
10 ms
2.5 s
100
100 ms
25 s
1,000
1,000 ms (1 s)
250 s
If filtering is active, an average is calculated for the set time range. However a value is still issued during the
sampling rate interval. For example, if the filter is set to 1,000, the average of the measurements for the
previous 1,000 ms / 1,000 measurements is issued each millisecond (or, in the case of operating mode
AI-PT, the average for the last 250 ms / 1,000 measurements).
The filtering can be activated and configured using CODESYS V3. The sampling rate is constant. It can only
be filtered with a whole multiple of the sampling rate.
