Contec AO-1604CI2-PCI, Руководство пользователя

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4. Functions
AO-1604CI2-PCI
47
Output data
The following equation represents the relationship between output data and voltage.
Output data = ((voltage – Min. range value) x Resolution)
÷
(Max. range value – Min. range value)
The value of resolution for the 12-bit device is 4096; that for the 16-bit device is 65536.
<
±
10V range>
The table below shows the relationship between output data and voltage.
Voltage Output data (12-bit) Voltage Output data (16-bit)
+9.995V 4095 +9.99970V 65535
: : : :
0.005V 2049 0.00030V 32769
0V 2048 0V 32768
-0.005V 2047 -0.00030V 32767
: : : :
-10.000V 0 -10.000V 0
Ex.: When 3V is output at a resolution of 12-bit in the ± 10-V range
Output data = (3 - (-10)) x 4096
÷
(10 - (-10))
= 2662.4 *
* The value that can be set as output data at this time is an integer. Select "2662" or "2663" as the
output data.
The analog signal corresponding to the output data contains an error as follows:
- Output data "2662" converted to: 2.9980 V
- Output data "2663" converted to: 3.0029 V
This error is a consequential error occurring when output data is obtained from an expected analog
value.
<0 - 10V range>
The table below shows the relationship between output data and voltage.
Voltage Output data (12-bit) Voltage Output data (16-bit)
+9.998V 4095
9.99985V 65535
: :
:
:
5.002V 2049
5.00015V 32769
5V 2048
5V 32768
4.998V 2047
4.99985V 32767
: :
:
:
0V 0
0V 0