102 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Appendix A Get Diagnostic Status from Modules by Using Explicit Messaging
Another choice is to obtain overall status implicitly from the Module 
Definition dialog box by choosing Combined Status from the Input Status 
pull-down menu.
If the Combined Status changes, use Explicit Messaging to obtain the point 
level status.
Get Status Messages from 
1791ES-IB8XOBV4 Modules
Follow these steps to get status messages from 1791ES-IB8XOBV4 modules.
1. In the Module Definition dialog box, from the Input Status pull-down 
menu, choose Combined Status.