Module Inhibiting; Electronic Keying - Rockwell Automation Allen-Bradley ArmorBlock 5000 Series User Manual

Chapter 2 Module Features

Module Inhibiting

Electronic Keying

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Module inhibiting lets you indefinitely suspend a connection between a controller and a
module without removing the module from the configuration. This process temporarily stops
the connection between the controller and the module.
IMPORTANT Whenever you inhibit a module with outputs, all outputs change to the
state that is configured for Program mode.
For more information, see
on page
You can use module inhibiting in the following scenarios.
• You want to perform maintenance on the module.
• You want to update a module, for example, update the module firmware revision.
• You use a program that includes a module that you do not physically possess yet. You
do not want the controller to look for a module that does not yet exist. In this case, you
can inhibit the module in your program until it physically resides in the system.
Use the following procedure.
1. Inhibit the module.
2. Perform the action on the module.
3. Uninhibit the module.
To inhibit a module, see
Electronic Keying reduces the possibility that you use the wrong device in a control system. It
compares the device that is defined in your project to the installed device. If keying fails, a
fault occurs. These attributes are compared.
Attribute Description
Vendor The device manufacturer
Device Type The general type of the product, for example, digital I/O module.
Product Code The specific type of the product. The Product Code maps to a catalog number.
Major Revision A number that represents the functional capabilities of a device
Minor Revision A number that represents behavior changes in the device
The following Electronic Keying options are available.
Keying Option Description
Lets the installed device accept the key of the device that is defined in the project when the
installed device can emulate the defined device. With Compatible Module, you can typically
replace a device with another device that has the following characteristics:
• Same catalog number
Compatible
Module • Same or higher Major Revision
• Minor Revision as follows:
– If the Major Revision is the same, the Minor Revision must be the same or higher.
– If the Major Revision is higher, the Minor Revision can be any number.
Indicates that the keying attributes are not considered when attempting to communicate with
a device. With Disable Keying, communication can occur with a device other than the type
specified in the project.
WARNING: Be extremely cautious when using Disable Keying; if used incorrectly, this option
Disable Keying
can lead to personal injury or death, property damage, or economic loss.
We strongly recommend that you do not use Disable Keying.
If you use Disable Keying, you must take full responsibility for understanding whether the
device being used can fulfill the functional requirements of the application.
Indicates that all keying attributes must match to establish communication. If any attribute
Exact Match
does not match precisely, communication with the device does not occur.
Rockwell Automation Publication 5032-UM001A-EN-P - April 2023
Configure Channel Output State in Fault Mode
25.
Connection View on page 48.