turck BL20 Series - 17.2.3 Equations for 12-bit representation

Appendix
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510
17.2.3 Equations for 12-bit representation
The 12-bit-representation is ”left-justified”. The value is transmitted with 16 bit. The last 4 digits of
the binary number or respectively the last digit position of the hexadecimal value are always ”0”!
Current values from 0…20 mA
The decimal values for the current values from 0…20 mA can be calculated by means of the follow-
ing equation:
decimal value = 204.75 1/mA × current value
The value range:
0…20 mA
is displayed as follows:
000
hex
…7FFF
hex (decimal:
0…4095)
The decimal value can easily be changed into a hexadecimal value.
As the numbers are represented left-justified, a ”0” has to be added to the 3-digit hexadecimal value
or the number has to move one digit to the left.
XXX
hex
XXX0
hex
The 12-digit binary number has to be filled with 4 digits of ”0” or has to move 4 digits to the left:
XXXX.XXXX.XXXX XXXX.XXXX.XXXX.0000
Current values from 4 to 20 20 mA
The decimal values for the current values from 4…20 mA can be calculated by means of the follow-
ing equation:
decimal value = 255.9375 1/mA × current value-1023.75
The value range:
4…20 mA
is displayed as follows:
000
hex
…7FFF
hex
(decimal: 0…4095)
The decimal value can easily be changed into a hexadecimal value (see s. S. 510).