DCT Antares SB, User Manual

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3.5. ANALOG TO DIGITAL CONVERTER
sage on the TAIP reference:
>
SED20NV0;R05-;ACT=SSSXP21
<
This will make the unit automatically set the Output 2 high when
it leaves region
R05
. See the
GR
message on the TAIP reference for
information on how to create regions.
3.5 Analog to Digital Converter
The Antares SB
TM
has one ADC whose input voltage is located on
the I/O molex-type connector.
The input voltage range is 0V to 32V . The ADC value computed
by the unit is an average value of samples taken at a 10 seconds pe-
riod, so you will not correctly get a voltage pulse that last a shorter
time. For any change to be accurately read the 10 seconds has to
pass in order for the average computation to get stable.
This reading method gives the converter the ability to filter rapid
changes or voltage swings that are undesirable when the voltage is
proportional to some physical variables prone to this behavior.
The actual computed value in millivolts may be consulted at any
time with the
XAAC
message, see the TAIP reference for more infor-
mation.
Query the actual computed value: Example
>
QXAAC
<
For an ADC computed value of 23.344 volts (72% OF 32V)the unit
responds:
>
RXAAC23344P072
<
Sending reports whenever the ADC reaches some value or whenever
it falls from another value
6
is possible by using the Event Machine
with the
D
signals which are configured with the
XAGA
message.
Have the unit send event code 23 whenever the ADC input voltage Example
goes beyond 20 volts and code 21 whenever the voltage falls below 12
volts:
Create the 2 ADC thresholds:
>
SXAGA01V12000
<
6
Up to 5 ADC thresholds may be defined with the
XAGA
message.
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