Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 270)

270 Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
Appendix B Electronic Keying
EXAMPLE In the following scenario, Disable Keying allows I/O communication:
• The module configuration is for a 1756-IA16 digital input module. The physical module is a
1756-IB16 digital input module. In this case, communication is allowed because the two
digital modules share common data formats.
IMPORTANT Changing electronic keying selections online can cause the I/O communication connection to
the module to be disrupted and can result in a loss of data.
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input Module
Cat. No. = 1756-IA16
Major Revision = 2
Minor Revision = 1
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input Module
Cat. No. = 1756-IB16
Major Revision = 3
Minor Revision = 2
Communication is allowed