Specifications

Analog Input Modules
31007715 6/2008 213
However due to user-configurable offset and max count, if used, an OVW may be
generated before the reported count reaches 32 001. Similarly, the reported count
may be at 32 767, but you may not receive the expected OVE.
An ideal linear representation of analog input voltage (one with default offset and
maximum count) is given by the following formula:
C
n
= (V
ai
- 1) x 8000
where C
n
is the numerical count and V
ai
is the analog input voltage.
In an ideal linear voltage representation for 0 to 5 VDC range (one with default offset
or max count settings (see p. 203)), a value of 32 001 represents an OVW. If the
input value is less than or equal to 767, the module reports a UVW. When the input
value reaches 32 767, an OVE occurs. When the input value reaches 0, a UVE
occurs.
However due to user-configurable offset and max count, if used, an OVW may be
generated before the reported count reaches 32 001. Similarly, the reported count
may be at 32 767, but you may not receive the expected OVE.
An ideal linear representation of analog input voltage (one with default offset and
maximum count) is given by the following formula:
C
n
= V
ai
x 6400
V
C
ai
n
32 767
32 001
16 000
<1 V
UVW
UVE
0.905 V
-767
3V
>5 V
5.10 V
OVE
OVW
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