Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 145)

Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013 145
Get Point Status from Modules by Using Explicit Messaging Appendix A
1791DS-IB12 Module
Definition Configuration Follow this procedure to configure the 1791DS-IB12 module definition.
1. In the Module Definition dialog box, from the Input Status pull-down
menu, choose Combined Status-Muting.
This creates a 2-byte assembly, as shown for the 1791DS-IB12 module.