I'm going to resurrect this old thread because google users will still end up here with this problem..
Here is a video link to as to how to setup a 1789-SIM module: https://images.rakb.link/732965/sim2.mp4
Module to use in RSLogix 5000 - 1756-Module
Input Assembly Instance 1, Size 2
Output Assembly Instance 2, Size 1
Configuration Assembly Instance 16, Size 0
Comm format "Data - DINT"
Slot - whatever slot you assigned it to in Emulate 5000
Request packet interval - 50
Hint: If you have real world input and output modules configured in your program that you want to test, map them to 1789-SIM modules and you can test your code without re-addressing I/O points in your program. Take a look at page 103 of this manual for help on this. http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1789-um002_-en-p.pdf