80 Rockwell Automation Publication 290E-UM001B-EN-P - June 2012
Chapter 3 Product Commissioning
• User I/O Configuration: Specify the Input or Output use for each I/O
point
• Keypad Option: Is product supplied with this option
• Electro-Mechanical Brake Option: Is product supplied with this option
The figure below is an example of the Module Definition page.
Electronic Keying
The electronic keying feature automatically compares the expected module, as
shown in the RSLogix 5000 I/O Configuration tree, to the physical module
before I/O communication begins. You can use electronic keying to help prevent
communication to a module that does not match the type and revision expected.
Typically, three keying options are available:
• Exact Match
Exact Match keying requires all keying attributes, that is, Vendor, Product
Type, Product Code (catalog number), Major Revision, and Minor
Revision, of the physical module and the module created in the software
to match precisely to establish communication.
• Compatible Keying
Compatible Keying indicates that the module determines whether to
accept or reject communication. Compatible Keying is the default setting.
• Disable Keying
Disabled Keying indicates the keying attributes are not considered when
attempting to communicate with a module.
ATTENTION: Be extremely cautious when using Disabled Keying; if used incorrectly,
this option can lead to personal injury or death, property damage, or economic loss.
Changing electronic keying selections online may cause the I/O communication
connection to the module to be disrupted and may result in a loss of data.
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