B-14 ADAM 4000 Series User's Manual
Data Formats and I/O Ranges
B.3.2 Percent of Span
The Percent of Span format is employed by setting bits 0 and 1 of the data
format/slew rate/checksum parameter to 01.
This format consists of a “+” or “-” sign, three decimal digits, a decimal
point and two decimal digits. Data is presented as the value sent of the
output signal relative to the span of the output (percent of span).
The maximum resolution is 0.2% of span (5 µA for the 0 to 20 mA output
range) and the desired output value is 10 mA the format of the Analog Data
Out command is as follows:
#01+050.00 (cr)
indicating that the output is at 50% of span. The decimal point is fixed.
B.3.3 Hexadecimal
This format is selected by setting bits 0 and 1 of the data format/slew rate/
checksum parameter to 10.
ASCII’s condensed hexadecimal representation of data allows and provides
high resolution, quick communication and easy conversion to computer-
compatible integer format. The format consists of a 3-character hexadecimal
string representing a 12-bit binary value. The resolution for the 0 to 20 mA
output range equals .025% of span, which is 5 µA. The corresponding value
for 000 is 0 mA; likewise, the value FFF corresponds to 20 mA.
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