Configure a ControlNet Module 
 
46  Rockwell Automation Publication CNET-UM001F-EN-P - February 2018 
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. 
Module Configuration: 
Vendor = Allen-Bradley 
Product Type = Digital Input 
Module 
Catalog Number = 1756-IA16 
Major Revision = 2 
Minor Revision = 1 
 
 
 
 
Communication is allowed. 
 
 
Physical Module: 
Vendor = Allen-Bradley 
Product Type = Digital Input 
Module 
Catalog Number = 1756-IB16 
Major Revision = 3 
Minor Revision = 2 
 
 
 
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. 
 
You must use RSNetWorx for ControlNet software to schedule the network 
in order to activate the configured I/O devices in your application. You must 
also reschedule the network if a change is made to an already-scheduled 
network. 
RSNetWorx for ControlNet software stores information in keeper devices. 
These ControlNet communication modules are keeper-cable devices: 
•  1756-CN2 and 1756-CN2R modules 
•  1756-CNB and 1756-CNBR modules 
•  1768-CNB and 1768-CNBR module 
•  1769-L32C and 1769-L35CR controllers 
ControlNet Software 
Network for the First 
Time