Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 21)

Publication 1794-UM065B-EN-E - September 2010
Configurable FLEX I/O Analog Module Features 9
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 … 20 mA
The data format selected interprets input readings and returns them to the
PLC.
1794-IF8IH 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 0…20 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
5 4…20 mA
as % 0.16 % of
4…20 mA 2…22 mA -1250…+11250
(2’s complement)
(-12.50%…+112.5
0%) 625 With
error
steps
6 4…20 mA
as
√
%
0.17 % of
4…20 mA 4…22 mA 0…10607
(0…106.07%) With
error
steps,
under-r
ange
not
allowed
input (
20
)
Datatable = 10000
Datatable = 10000
√
input
20
IF...Square_Root_Threshold
< 10000
√
input
20
Else...datatable = 0
input (
20
)
Datatable = 65535
input-4 (
16
)
Datatable = 10000
Datatable = 10000
√
IF...Square_Root_Threshold
< 10000
√
Else...datatable = 0
input-4
16
input-4
16