Rockwell Automation 1747-AENTR SLC 500 EtherNet/IP Adapter User Manual - Manual (Page 54)

48 Rockwell Automation Publication 1747-UM076C-EN-E - January 2013
48 Configure the Adapter for Direct Connection through the RSLogix 5000 or Logix Designer Application
1746-IO8 Module Definition shown
Module Definition Fields
Field Description
Revision Specifies the major and minor module revision.
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.
For each module in the I/O Configuration tree, the user-selected keying option
determines if, and how, an electronic keying check is performed.
Typically, two keying options are available:
• Compatible Module
• Disable Keying
Compatible Module indicates that the module determines whether to accept
or reject communication. Compatible Keying is the default setting. It allows the
physical module to accept the key of the module configured in the software,
provided that the configured module is one the physical module is capable of
emulating. The exact level of emulation required is product and revision
specific.
Disable Keying indicates the keying attributes are not considered when
attempting to communicate with a module. Other attributes, such as data size
and format, are considered and must be acceptable before I/O communication is
established. With Disabled Keying, I/O communication may occur with a module
other than the type specified in the I/O configuration tree with unpredictable
results. We generally do not recommend using Disabled Keying.