Addi-Data APCI-8001, Commissioning Manual

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ANUAL
3.12.5 APCI-8001: Configuration of the analog input voltage ranges
With the environment variable MAX1270CH? , the input voltage range of the available analog inputs can be
configured for each channel. By setting this value, an analog input channel is activated simultaneously.
The ? stands for the index of the analog channel (0..7).
Value Voltage range
5VU
5 V unipolar (0 V..+5 V)
5VB
5 V bipolar (-5 V..+5 V)
10VU 10 V unipolar (0 V..+10 V)
10VB
10 V bipolar (-10 V..+10 V)
Example:
set MAX1270CH0 5VU
Further information about the use of analog inputs is to be found in the Options Manual.
3.12.6 APCI-8008: Configuration of the analog input voltage ranges
With the environment variable AD7606RNG, the input voltage range of the available analog inputs can be
configured. Here, the configuration cannot be set individually for each channel but for all analog inputs
together. Unlike the APCI-8001, there is no longer a unipolar operating mode with the APCI-8008. Instead,
the analog inputs have a 16-bit resolution.
Value Voltage range
5VB 5 V bipolar (-5 V..+5 V)
10VB
10 V bipolar (-10 V..+10 V)
Examplel:
set AD7606RNG 5VB
Further information about the use of analog inputs is to be found in the Options Manual.
With the APCI-8008, the environment variable
AD7606OS offers another configuration possibility:
The analog inputs have the option for hardware oversampling, i.e. the input voltage is read in several times
and an average value is computed automatically. The following values can be programmed:
Value Oversampling factor Conversion time / µs
0
No oversampling
5
1
2
10
2 4 20
3
8
40
4
16
80
5 32 160
6
64
320
If other values are programmed, oversampling will be deactivated. The default value is 0.
Example:
set AD7606OS 6