Allen-Bradley 1794-IE8H Manual do Utilizador Página 28

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Publication 1794-UM063A-EN-P - March 2006
2-4 Configurable FLEX I/O Analog Module Features
Data Format
You must choose a module data format in your user program. Formats 8, 9, 10
and 15 are not used. If they are selected for a channel quad, a configuration
fault will occur and will be reported as Diagnostic Data 2. All data for that
channel quad will be set to zero (0).
Formats 5, 12, 13 and 14 are 2’s complement data formats, and will
return data in that form.
12 Formats are available
Default format is 0 to 20 mA
The data format selected interprets input readings and returns them to
the PLC
Table 2.3 1794-IE8H Data Formats
Data
Format
Format Resolution Input
Range
Module Data Processing Data Table Value
(Interpretation)
Count
per mA
Error
Steps
0 0…20 mA
as mA
0.1% of
0…20 mA
0…22 mA Datatable = 1000 (input) 0…22000
(0…22.000 mA)
1000 With
error
steps
1 0…20 mA
as %
0.2% of
0…20 mA
0…22 mA 0…11000
(0…110.00%)
500
2 020 mA
as %
0.19% of
0…20 mA
0…22 mA 0…10488
(0…104.88%)
524
3 0…20 mA
as
unsigned
integer
0.03% of
0…20 mA
0…20 mA 0…65535
(0…22 mA)
3276
4 4…20 mA
as mA
0.1% of
4…20 mA
2…22 mA Datatable = 1000 (input) 2000…22000
(2.000…22.000
mA)
1000
Datatable = 10000
input
(
20
)
Datatable = 10000
input
20
IF…Square_Root_Threshold
input
20
< 10000
Else…datatable = 0
Datatable = 65535
input
(
20
)
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