turck BL67 - Equations for 12 Bit Representation

Appendix
D300529 0115 - BL67 I/O modules15-16
15.2.2 Equations for 12 bit representation
Current values from 0 to 20 mA
The value range:
0 mA to 20 mA
is displayed as follows:
000
hex
to FFF
hex
(decimal: 0 to 4095)
The hexadecimal/binary value can easily be changed into a decimal value.
The current value can now be calculated by means of the following equation:
current value = 4,88 mA × 10
-3
× decimal value
Current values from 4 to 20 mA
The value range:
4 mA to 20 mA
is displayed as follows:
000
hex
to FFF
hex
(decimal: 0 to 4095)
The hexadecimal/binary value can easily be changed into a decimal value.
The current value can now be calculated by means of the following equation:
current value = 3,91 mA × 10
-3
× decimal value
NOTE
The 12-bit-representation is "left-justified". The value is transmitted with 16 bit. The last 4 dig-
its of the binary number or respectively the last digit position of the hexadecimal value are
used as diagnostic bits!
NOTE
Before using the equation below, the hexadecimal or binary value has to be converted into a
decimal value. The value is contained in the 3 more significant digit positions of the hexadec-
imal number or in the 12 more significant bits of the binary number.
NOTE
In the 12-bit-representation only the 3 more significant digit positions of the hexadecimal
number or the 12 more significant bits of the binary number are used for the calculation of
the decimal value.