Rockwell Automation 1769-IF4FXOF2F Compact Combination Fast Analog I/O Module - Manual (Page 35)

Publication 1769-UM019A-EN-P - October 2008 35
Module Data, Status, and Channel Configuration Chapter 3
Word 7 holds the general status bits for each output channel as well as
the over and under output-clamp status bits. To receive valid status
information, the output channel must be enabled. Words 8 and 9
contain the data echo values for the most recent data sent to the
output channels.
Output Image
Output words 0 and 1 contain the digital data to be converted by
outputs 0 and 1 into analog output signals. Word 2 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. Word 3 contains the cancel latched output-clamp status
control bits for the high and low output-clamp statuses on each output
channel. These bits are used to cancel output-clamp statuses when the
clamp statuses 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.
Some systems, like the 1769-ADN DeviceNet adapter system, also
allow the bits to be altered as part of the control program by using
communication rungs. In that case, it is necessary to understand the
bit arrangement
.
TIP
Not all controllers support program access to the configuration
file. Refer to your controller’s user manual.