Rockwell Automation 1756-CFM ControlLogix Configurable Flowmeter Module - Manual (Page 31)

31 Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Configurable Flowmeter Module Features and Operational Modes 31
EXAMPLE
In this scenario, Compatible Keying allows I/O
communication:
The module configuration is for a 1756-IB16D module with
module revision 2.1. The physical module is a 1756-IB16D
module with module revision 3.2. In this case,
communication is allowed because the major revision of the
physical module is higher than expected and the module
determines that it is compatible with the prior major
revision.
IMPORTANT
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.
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 2
Minor Revision = 1
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 3
Minor Revision = 2
Communication is allowed.