Specifications

Analog Input Modules

238

31007715 6/2008

where C

is the numerical count and V

is the analog input voltage.

Data Format for 0 to 10 VDC:

In an ideal linear voltage representation for 0 to 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 767, the module will report 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:

Error 0 to 10 VDC Range

OVE (over voltage error) 10.24 VDC

(32 767)

OVW (over voltage warning) >10 VDC

(32 001)

UVW (under voltage warning) <0.24 VDC

(767)

UVE (under voltage error) 0 VDC

(0)

32 767

>5 V

5.12 V

32 001

<0.12 V

OVE

OVW

UVW

UVE

767

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