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7-1
Section
Analog Input Units
117
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
The number of inputs can be limited to four by turning ON pin 14 of the DIP
switch. Changing the number of inputs from eight to four reduces the sampling
time from 8 ms to 4 ms, providing faster conversion.
If four inputs are used, the number of words allocated to the Input Unit in the PC
is also reduced to 4 words. When only four inputs are used, inputs 0, 2, 4 and 6
are used (i.e., inputs 1, 3, 5 and 7 cannot be used.)
Number of Inputs
Содержание PRT1-COM
Страница 1: ...Cat No W900 E2 1 PROFIBUS DP MULTIPLE I O TERMINAL PRT1 COM GT1 Series ...
Страница 2: ...PRT1 COM GT1 Series PROFIBUS DP MULTIPLE I O TERMINAL Operation Manual Produced December 1999 ...
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Страница 187: ...Cat No W900 E2 1 Note Specifications subject to change without notice December 1999 Authorized Distributor ...