Change Of State Mode; Connections - Rockwell Automation Allen-Bradley ArmorBlock 5000 Series User Manual

Chapter 1 Introduction

Connections

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Change of State Mode

For input event connections, the IO-Link master module uses Change of State (COS) mode to
update the input data. New data is sent to the controller immediately when a transition occurs.
When there is no change of state, the data is sent at the time that is defined in the RPI.
You can define connections for the IO-Link master module and IO-Link devices by choosing a
connection type. A connection is a real-time data transfer link between the controller and the
module or device that the project references.
During IO-Link master module or IO-Link device configuration, the connection type determines
what data is exchanged between the controller and the module or device. When you uninhibit a
module or device in online mode, or download the project with modules or devices that are
uninhibited to the controller, the controller attempts to establish a connection to each module
and device.
One of the following occurs:
• If the configuration is appropriate to the module or device that is detected, a
connection is made and operation begins.
• If the configuration is not appropriate to the module or device that is detected, the data
is rejected and the Studio 5000 Logix Designer application indicates that an error
occurred.
The configuration can be inappropriate for many reasons. For example, a mismatch in
Electronic Keying that prevents normal operation.
For more information on how to troubleshoot issues, see the following:
- Troubleshoot Your IO-Link Master Module on page
- Troubleshoot Your IO-Link Device on page
The controller monitors its connection with an IO-Link master module and IO-Link devices. Any
break in the connection, for example, the loss of power to the system, causes a fault. The
Studio 5000 Logix Designer application monitors the fault status tags to indicate when a fault
occurs on an IO-Link master module or IO-Link device.
To see where to change the connection type:
• For the IO-Link master module, see
• For the IO-Link device, see
Rockwell Automation Publication 5032-UM001A-EN-P - April 2023
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89.
Module Definition on page
Module Definition on page 68.
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