Manual

60 Publication 1757-UM007D-EN-P - December 2008
Chapter 5 Configuring RSLogix 5000 Software to Access Data on the 1757-ABRIO Module
Scheduled Digital I/O
Connections in RSLogix
5000 Programs
1757-ABRIO module firmware versions 1.2 and above support
scheduled connections for exchanging digital input and output data
between the 1757-ABRIO module and the host ControlLogix
controller. This results in much faster updates for the digital data than
is possible using unscheduled messages. This section describes how
to configure the module and the format of the scheduled data.
When you add a 1757-ABRIO module to the I/O Configuration of an
RSLogix 5000 program using the generic 1757-MODULE profile, a data
connection is created for the digital remote I/O data. See Tag
Descriptions for Scheduled Data in RSLogix 5000 Software on
page 149 for more information about the status tag when using
ControlLogix. The status tag gives global status for digital data and
individual rack status.
Scheduled Connection Types
There are two types of scheduled connection.
Exclusive Owner, read/write
Input Only, read only
Setup an Exclusive-owner Connection
Configure a generic module profile in RSLogix 5000 software to
represent the 1757-ABRIO module. This dictates the format and
amount of scheduled data, and how often the scheduled data is
transferred. The ControlLogix controller is the owner of the
connection and controls the digital outputs. The connection is referred
to as an exclusive-owner connection.
TIP
In order to access any numeric read, numeric write, or text read
data from the ControlLogix controller you must also complete
Unscheduled I/O Connections in ControlLogix
on page 67.
IMPORTANT
In order for the scheduled connection to control the outputs of a
chassis, the chassis must not be mapped to any flag write tag
in the AbRioCfg software configuration that has been
downloaded to the 1757-ABRIO module.