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ABB i-bus
EIB / KNX
Anhang
A.1
Scope of delivery
A.2
Communication object
measured value out of
range
Sensor signal
Undershotout of range
(5 %)
10 % and higher
Overshotout of range
(about 5 %)
about 10 % and higher 1.06 V
Appendix
Analogue Input AE/S 4.2 is supplied with the following parts.
Please check the scope of delivery against the following list.
– 1 x AE/S 4.2, Analogue Input, 4-fold, MDRC
– 1 x installation and operating instructions
– 1 x bus connection terminal (red/black)
When is the communication object measured value out of range sent?
Measured value out of range is sent if the measured value exceeds
the lower threshold by about 5 %. This only applies if the lower limit is
not equal to 0. If the lower value is 0 it is not possible to determine an
undershoot.
Measured value out of range is sent if the measured value upper limit is
exceeded by 5 % or if the physical input variable of the analog input can
no longer be detected (overflow).
Is sent if exceed or undershot by 10 %?
The measured value is kept down if the measured value exceeds the lower
threshold by about 10 %. This only applies if the lower limit is not equal to
0. If the lower value is 0 it is not possible to determine an undershoot.
The measured value is kept up if the measured value upper limit is
exceeded by 10 % or if the physical input variable of the analog input can
no longer be detected (overflow).
Which exception applies for the PT100 sensor input?
With the calculation of the maximum and minimum output values the
PT100 sensor input is an exception. Here the lower limit of – 10 % or upper
limit + 10 % applies.
The smallest measurable resistance is about 88 ohms and corresponds
to about – 30°C. The largest measurable resistance is about 130 ohms
and corresponds to about 78°C. The measured resistance is subtracted
from the programmable line resistance. Then any possible programmable
temperature offset is added. The following differences result depending
on the parameterization of the line resistance's and the temperature offset
Minimum and maximum values.
If the measurement limits are achieved, the communication object
"measured value out of range" is set to "1" without further tolerance.
The table shows the maximum limits, see 100 % usage of the
measurement range.
0–1 V
0–5 V
0–10 V
1–10 V
no
no
no
< 0.95 V 0 mA
0 V
0 V
0 V
0,9 V
> 1.05 V > 5.25 V > 10.5 V > 10.5 V 20.28 mA 20.28 mA 1050 Ohm
5.3 V
10.6 V
10.6 V
Table 10: Communication object measured value out of range
0–20 mA 4–20 mA 0–1000 Ohm PT100
< 3.8 mA no
0 mA
3.6 mA
0 Ohm
20.28 mA 20.28 mA 1100 Ohm
PT100
(– 30...+ 70°C)
(– 200...+ 800°C)
– 31°C
<– 202°C
– 31°C
– 205°C
+ 79°C
>+ 816°C
+ 79°C
+ 878°C
I
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