Specifications

Analog Input Modules
31007715 6/2008 215
C
n
= V
ai
x 3200
where C
n
is the numerical count and V
ai
is the analog input voltage.
Data Formats +/-5 VDC and +/-10 VDC
In an ideal linear voltage representation for +/-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 -32 001, the module reports 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.
Error +/-5 VDC Range +/-10 VDC Range
OVE (over voltage error) 5.12 VDC
(32 767)
10.24 VDC
(32 767)
OVW (over voltage warning) >-5 VDC
(32 001)
>10VDC
(32 001)
UVW (under voltage warning) < 5 VDC
(-32 001)
<10VDC
(-32 001)
UVE (under voltage error) -5.12 VDC
(-32 768)
-10.24 VDC
(-32 768)
32 767
>10 V
10.24 V
32 001
0
<0.24V
OVE
OVW
UVW
UVE
n
ai
V
C
767
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