Rockwell Automation 1756-OF8H ControlLogix HART Analog I/O Modules - Manual (Page 80)

80 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Chapter 6 1756-OF8H HART Analog Output Module
Data Formats
Data format determines which values are included in the Input tag of the module
and the features that are available to your application. Select the data format on
the General tab in RSLogix 5000 software. The following data formats are
available for the 1756-IF8H module.
• Choose Analog and HART PV if you prefer the members of your tag to be
arranged similar to non-HART analog input modules, with the analog
values for all channels grouped together near the end of the tag. This makes
it easy to view all eight analog values at once.
• Choose Analog and HART by Channel if you prefer Status, Analog Value,
and Device Status for each channel to be together in the tag. This makes it
easier to view all of the data related to one field device.
Resolution
The output module is capable of 15 or 16 bit resolution.
Description
Analog
signal
values Analog
status HART secondary
process variables
and device health HART and Analog data
for each channel
grouped together in tag
Format
Analog Only X X
Analog and HART
PV X X X
Analog and HART
by Channel
(1)
(1) Available only for 1756-OF8H firmware revision 2.1.
X X X X
Number of
Significant Bits Range Resolution
16 bits +/- 10.4V 320 μV
15 bits 0…20 mA
4…20 mA 0.65 μA