ADLINK ND-6067 - Manual (Page 263)

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8.3 Hexadecimal or Two’s Complement Hexadecimal
Hexdecimal Format
Hexdecimal Format is for ND-602x modules.The data is in
hexdecimal format as the bit 1 and 0 are set as ‘10’. The data
string length is 3 characters. It is equivilant to 12 binary bits.
Because the output of ND-6021 is unipolar, the maximum value
of the digits is FFF(H) and the minimum value of the digits is
000(H).
As the output range is set to 0~20mA, the value ‘FFF(H)’
represents 20mA and ‘000(H)’ represents 0mA. Similarily, as
the output range is set to 4~20mA, the value ‘FFF(H)’ represents
20mA and ‘000(H)’ represents 4mA.
The different analog output ranges have different resolutions.
Refer to Table 8-8 for details.
Code
Output
Range
Data
Format
Maximum
Value
Minimum
Value
Output
Resolution
30 0 to 20 mA Hexdecimal FFF 000 4.88
μA
31 4 to 20 mA Hexdecimal FFF 000 4.88
μA
32 0 to 10 V Hexdecimal FFF 000 2.442 mV
Table 8-8 Analog Output Range and resolution
‹ Example 1 :
♦
If the output range is set as 0 to 20 mA
♦
The desired analog output current is 10 mA
Hexdecimal Format: 7FF
Two’s Complement Hexadecimal
Two’s Complement Hexadecimal is for ND-601x modules.
• Data format bit 1 and 0 set to 10 is 2’s complement
• Data is 4-character(16 binary bits) hexadecimal string
• Positive full scale is 7FFF (+32767)
• Negative full scale is 8000 (-32768)
•
The different analog input ranges have different resolutions.
Refer to Table 8-9 and Table 8-10 for details.