Specifications

Analog Output Modules
31007715 6/2008 345
The value of the data word is represented in bits 14 through 0. The bits represent
current data as integer values in the range 0 to 32 767. A value of 32 000 results in
a 20 mA output, and a value of 0 results in a 4 mA output.
Output current value (in mA) is given by the following formula:
where C
n
is the numerical count and I
ao
is the analog output current.
Values greater than 32 000 produce over-range indications.
Error 4 to 20 mA Range
OCE (over current error) 20.38 mA
(32 767)
OCW (over current warning) > 20 mA
(32 001)
UCW (under current warning) < 4 mA
(0)
UCE (under current error) <= 3.5 mA
(-1000)
I
ao
C
n
2000
------------
⎝⎠
⎛⎞
4+=
I
C
ao
n
32 767
32 000
16 000
4mA
UCW
UCE
3.5 mA
-1 000
12 mA
20 mA
20.38 mA
OCE
OCW
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