Analog And Digital Value Conversions - Automation Direct DL405 User Manual

12–24
F4–04DA 4-Channel Analog Output
Analog and
Digital Value
Conversions
Sometimes it is helpful to be able to quickly convert between the voltage or current
signal levels and the digital values. This is especially helpful during machine startup
or troubleshooting. The following table provides formulas to make this conversion
easier.
Range If you know the digital value ...
0 to 5V
A + 5D
0 to 10V
A + 10D
$5V
A + 10D
$10V
A + 20D
4 to 20mA
A + 16D
For example, if you are using the –10 to
+10V range and you know you need a
6V signal level, you would use the
following formula to determine the digital
value that should be stored in the
V-memory location that contains the
data.
Now you have all the necessary information to get your analog module installed and
operating correctly.
If you know the analog signal
level ...
4095
4095
* 5
4095
* 10
4095
) 4
4095
D + 4095
(A)
5
D + 4095
(A)
10
D + 4095
(A ) 5)
10
D + 4095
(A ) 10)
20
D + 4095
(A * 4)
16
D + 4095
(A ) 10)
20
D + 4095
(6V ) 10)
20
D + (204.75) (16)
D + 3276