144
Analog I/O Terminals Section 4-8
1- to 5-V Inputs
The 1- to 5-V range corresponds to the hexadecimal values 0000 to 1770 (0
to 6000). The most significant bit (bit 15) is set to 1 (ON) for voltages from
0.8 V to 1 V and the AD conversion data is set to the absolute values; the rest
of the word indicates the absolute value. The entire data range is 812C to
189C (–300 to 6300). If the input voltage falls below 0.8 V, the open-circuit
detection function is activated and the converted data is set to FFFF.
0- to 20-mA Inputs
The 0- to 20-mA range corresponds to the hexadecimal values 0000 to 1770
(0 to 6000). The most significant bit (bit 15) is set to 1 (ON) for negative values
and the AD conversion data is set to the absolute values; the rest of the word
indicates the absolute value. The entire data range is 812C to 189C (–300 to
6300).
4- to 20-mA Inputs
The 4- to 20-mA range corresponds to the hexadecimal values 0000 to 1770
(0 to 6000). The most significant bit (bit 15) is set to 1 (ON) for currents from
3.2 to 4 mA and the AD conversion data is set to the absolute values; the rest
of the word indicates the absolute value. The entire data range is 812C to
189C (–300 to 6300). If the input current falls below 3.2 mA, the open-circuit
detection function is activated and the converted data is set to FFFF.
189C (6300)
1770 (6000)
FFFF
0000 (0)
812C (–300)
0.8 V
1 V 5 V 5.2 V
Converted data
Hexadecimal (decimal)
Voltage
189C (6300)
1770 (6000)
–1 mA
0 mA 20 mA 21 mA
812C (–300)
0000 (0)
Converted data
Hexadecimal (decimal)
Current
189C (6300)
1770 (6000)
FFFF
0000 (0)
812C (–300)
3.2 mA
4 mA 20 mA 20.8 mA
Converted data
Hexadecimal (decimal)
Current
To Next Page
Loading...
