Specifications

Analog Input Modules
240
31007715 6/2008
C
n
= V
ai
x 6400
where C
n
is the numerical count and V
ai
is the analog input voltage.
In an ideal linear voltage representation for +/-10 VDC range (one with default offset
or max count settings (see p. 228)), a value of 32 001 represents an OVW. If the
input value is less than or equal to -32 001, the module will report a UVW. When the
input value reaches 32 767, an OVE occurs. When the input value reaches -32 767,
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 voltage representation (one with default offset or max count settings)
is given by the formula:
C
n
= V
ai
x 3200
32 767
32 001
5.12 V
>5 V
OVE
OVW
-32 768
-32 001
-5.12 V
<-5 V
UVE
UVW
n
ai
V
C
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