Omron SRM1 - PROGRAMING 02-2001, Руководство по программированию

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3-1 Section Analog I/O Units
182
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). Inputs between
3.2 and 4 mA are expressed as two’s complements. If the input falls below
3.2 mA, open-circuit detection will activate and converted data will be 8000.
Converted Data
Hexadecimal (Decimal)
189C (6300)
1770 (6000)
0000 (0)
FED4 (–300)
3.2 mA
4 mA
20 mA 20.8 mA
0 mA
The Analog I/O Unit converts the digital output data to analog values. The analog
values depend on the output signal ranges, as shown in the following diagrams.
–10 to 10 V
The hexadecimal values F448 to 0BB8 (–3000 to 3000) correspond to an analog
voltage range of –10 to 10 V. The entire output range is –11 to 11 V. Specify a
negative voltage as a two’s complement.
Conversion
Data
Hexadecimal
(Decimal)
11 V
10 V
F31C
(–3300) F448
(–3000)
0000 (0)
0 V
–10 V
–11 V
8000
7FFF
0BB8
(3000) 0CE4
(3300)
0 to 10 V
The hexadecimal values 0000 to 1770 (0 to 6000) correspond to an analog volt-
age range of 0 to 10 V. The entire output range is –0.5 to 10.5 V. Specify a nega-
tive voltage as a two’s complement.
Conversion
Data
Hexadecimal
(Decimal)
10.5 V
10 V
0 V
8000 FED4
–0.5 V
1770
(6000) 189C
(6300)
0000 (0) 7FFF
(–300)
Analog Output Signal
Ranges