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7-1
Section
Analog Input Units
109
1 to 5 V
The 1- to 5-V range corresponds to the hexadecimal values 0000 to 1770 (0 to
6000). The entire data range is FED4 to 189C (--300 to 6300). If the input voltage
falls below 0.8 V, the open-circuit detection function will activate and the
converted data will be set to 7FFF.
Converted data
Hexadecimal (Decimal)
Voltage
189C (6300)
1770 (6000)
7FFF
0000 (0)
FED4 (--300)
0.8 V
1 V
5 V 5.2 V
0 to 20 mA
The 0- to 20-mA range corresponds to the hexadecimal values 0000 to 1770 (0
to 6000). The entire data range is FED4 to 189C (--300 to 6300). A negative
voltage is expressed as a two’s complement (16 bits). If the line is disconnected,
the data will be the same as an input of 0 mA (0000 Hex).
Converted data
Hexadecimal (Decimal)
Current
189C (6300)
1770 (6000)
--1 mA
0 mA
20 mA 21 mA
FED4 (--300)
0000 (0)
4 to 20 mA
The 4- to 20-mA range corresponds to the hexadecimal values 0000 to 1770 (0
to 6000). The entire data range is FED4 to 189C (--300 to 6300). If the input
current falls below 3.2 mA, the open-circuit detection function will activate and
the converted data will be set to 7FFF.
Converted data
Hexadecimal (Decimal)
Current
189C (6300)
1770 (6000)
7FFF
0000 (0)
FED4 (--300)
3.2 mA
4 mA
20 mA 20.8 mA