Rockwell Automation 1769-IF16V Compact High Density Analog Input Modules - Manual (Page 30)

30 Publication 1769-UM018A-EN-P - October 2008
Chapter 3 Module Data, Status, and Channel Configuration
Input Image
The input image file represents data words and status bits. Input
words 0…15 hold the input data that represents the value of the
analog inputs for channels 0…15. These data words are valid only
when the channel is enabled and there are no errors. If time stamping
is enabled, Word 16 in the input data file contains the time stamp
value that corresponds to the module's last input data sampling
period. Input words 17…21 hold the general status bits for each
channel as well as the high and low alarm and over-range and
under-range bits. To receive valid status information, the channel must
be enabled.
Output Image
The output image file contains the cancel latched alarm control bits
for the high and low alarms on each input channel. These bits are
used to cancel alarms when alarms are latched.
Configuration File
The configuration file contains information that you use to define the
way a specific channel functions.
The manipulation of bits from this file is normally done with
programming software (for example, RSLogix 5000, RSLogix 500, or
RSNetWorx for DeviceNet software) during initial configuration of the
system. In that case, graphical screens provided by the programming
software simplify configuration.