ADLINK ND-6021 - Manual (Page 59)

Data Format • 53
4.3 Percent of FSR
The date is in percent of FSR(Full Scale Range) when the bit 1 and 0 of the
configuration register are ‘01’. The data string is composited by 6 characters.
Because the output of ND-6021 is unipolar, the value is always positive.
The value is unit-less and depends on the output range setting too.
• Set bit 1 and bit 0 of data format variable to “01” means the data is
represented in percent of FSR.
• Data string is fixed length of 6 characters. The value is composed of
five decimal digits with a decimal fixed point.
• Three digits present the integer part and two digits present the fraction
• Maximum resolution is 0.2%.
Example 4.3.1 :
• If the output range is set as 0 to 20 mA
• The desired analog output current is 10 mA
The data value should be : 050.00
10 mA / 20 mA = 50.00 %
Example 4.3.2 :
• If the output range is set as 4 to 20 mA
• The desired analog output current is 10 mA
The data value should be : 037.50
(10 mA - 4 mA ) / (20 mA - 4mA) = 37.50 %