Specifications

Analog Output Modules
31007715 6/2008 285
Output
Data Registers
Each STB AVO 1265 data register represents the output voltage data in the IEC
data format. The data has 9-bit + sign resolution:
The value of each data word is represented in bits 15 through 6, The bits represent
voltage data as integer values in the range -32 768 ... +32 704 in increments of 64.
When the sign bit (bit 15) is 0, the value is positive; when bit 15 is 1, the value is
negative.
Linear voltage representations can be interpreted using the formula:
where Cn is the numerical count and Vao is the analog output voltage. Voltage data
is represented as follows:
Values greater than 32 000 and less than -32 000 do not produce out-of-range
indications.
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
ignored
-10 to +10 V Data Register Format
1
2
34567
910111213
14
15
0
8
sign bit
C
n
V
ao
3200×=
32 704
32 000
9V
10.22 V
10 V
28 800
-9 V
-10 V
-10.24 V
-32 768
-32 000
-28 800
V
ao
C
n
1V
2V
3200
6400-2 V
-6400
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