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Analog Input Units Section 5-4
■ Input Range: –10 to 10 V
The voltage range –10 to 10 V corresponds to F448 to 0BB8 hex (–3,000 to
3,000). The convertible data range is F31C to 0CE4 hex (
–3,300 to 3,300).
Negative voltages are expressed as two’s complements (16 bits). When a dis-
connection occurs, the data equivalent to 0 V input will be used (0000 hex).
■ Input Range: 0 to 20 mA
The current range 0 to 20 mA corresponds to 0000 to 1770 hex (0 to 6,000).
The convertible data range is FED4 to 189C hex (
–300 to 6,300). Negative
currents are expressed as two’s complements (16 bits). When a disconnec-
tion occurs, the data equivalent to 0 mA input will be used (0000 hex).
■ Input Range: 4 to 20 mA
The current range 4 to 20 mA corresponds to 0000 to 1770 hex (0 to 6,000).
The convertible data range is FED4 to 189C hex (
–300 to 6,300). If the input
current is below the input range (input current less than 3.04 mA), a discon-
nection is detected and the data is set to 7FFF hex.
0CE4 (3300)
0BB8 (3000)
F448 (
−
3000)
F31C (
−
3300)
0000 (0)
0 V
−11 V −10 V
10 V 11 V
Conversion data
Hexadecimal (decimal)
Voltage
189C (6300)
1770 (6000)
0000 (0)
0 mA
FED4 (−300)
−1 mA
20 mA
21 mA
Conversion data
Hexadecimal (decimal)
Current
189C (6300)
1770 (6000)
FED4 (−300)
0000 (0)
4 mA
3.2 mA
20 mA 20.8 mA
7FFF
3.04 mA
(Disconnection detected below 3.04 mA.)
Conversion data
Hexadecimal (decimal)
Current
Clamped
above
20.8 mA.