6-2
Current Input Range and Converted
Values
Analog current input signals are converted to digital values according to the input range shown below.
If the input range exceeds the value range for which conversion is possible, the converted value is
fixed at the upper or lower limit.
Input Range: 0 to 20 mA
A current of 0 to 20 mA is converted to a signed integer value (0 to 32000).
The resolution is 1/32000.
The input current range for which conversion is possible is -0.4 to 20.4 mA and the converted value is
a signed integer value (-640 to 32640).
The disconnection detection function is not supported.
+32640
+32000
-640
-0.4 mA
0
0 mA
+20 mA +20.4 mA
Fixed at the lower
limit in case
of -0.4 mA or less.
Fixed at the upper
limit in case of
+20.4 mA or more.
Converted value
(decimal)
Current
Input Range: 4 to 20 mA
A current of 4 to 20 mA is converted to a signed integer value (0 to 32000).
The resolution is 1/32000.
The input current range for which conversion is possible is 3.68 to 20.32 mA and the converted value
is a signed integer value (-640 to 32640).
If the input value falls below the input range such as for a disconnection, and the input current is less
than 1.2 mA, the disconnection detection function activates. At this time, the converted value will be
32767.
6 Input Range and Converted Values
6 - 5
NX-series Analog I/O Units User’s Manual for High-speed Analog Input Units (W592)
6-2 Current Input Range and Converted V
alues
6
