28 Rockwell Automation Publication 5094-UM001C-EN-P - April 2019
Chapter 1 Digital I/O Module Operation in a Logix 5000 Control System
Connections for Safety I/O
Modules
During module configuration, you must define the module. Among the Module
Definition parameters with FLEX 5000 safety I/O modules, you must choose
how module is configured.
The choice depends on whether the project is downloaded to the controller that
owns the module configuration
, that is, the owner-controller, or to a controller
that is listening to input modules in a project.
A real-time data transfer link is established between the controller and the
module that occupies the slot that the configuration references.
When you download module configuration to a controller, the controller
attempts to establish a connection to each module in the configuration.
Because part of module configuration includes a slot number in the remote
FLEX 5000 I/O system, the owner-controller checks for the presence of a
module there. If a module is detected, the owner-controller sends the
configuration. One of the following occurs:
• If the configuration is appropriate to the module detected, a connection is
made and operation begins.
• If the configuration is not appropriate to the module detected, the data is
rejected and the Logix Designer application indicates that an error
occurred.
The configuration can be inappropriate for many reasons. For example,
a mismatch in electronic keying that helps prevents normal operation.
The owner-controller monitors its connection with a module. Any break in the
connection, for example, the loss of power to a remote FLEX 5000 I/O system,
causes a fault. The Logix Designer application monitors the fault status tags to
indicate when a fault occurs on a module.
STATUS
POWER
SAFETY DIGITAL 16 INPUT 24 VDC
5094-IB16S
5
5
TB3I
FLEX 5000
TM
I/O
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IMPORTANT This section shows some Logix Designer application screens that are used
when you configure FLEX 5000 I/O safety modules. For a complete
description of how to configure the modules, see Chapter 7
, Configure and
Replace Safety Modules on page 107.
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