---Power supply fault---
Just an info,
In SLC you can let RSLogix 500 to calculate whether the power supply used is sufficient or not.
Go to I/O Configuration tab and click on the "Power supply" button (assuming the all of your modules have been selected in the I/O configuration).
This will open up a Power supply loading form, select your power supply model, in the message box, a warning is displayed if your power supply used is under sized.
This calculation in the software is just for "information" for you to size up your power supply, it don't remedy errors.
Good Luck