MATT.G,

I dug into the users manual for sleep mode settings and found this information about deep sleep mode on your printer. 

Set the Sleep Mode Countdown
The Sleep Mode (or Power Save Mode) setting can reduce power consumption. When the machine is in Sleep
Mode, it acts as though it is turned off. The machine will wake up and start printing when it receives a print job or a
fax. Use these instructions to set a time delay to send the machine into Sleep Mode.
• You can choose how long the machine must be idle before it goes into Sleep Mode.
• The timer will restart if any operation is carried out on the machine, such as receiving a print job.

1. Press Menu.
2. Press p or q to display the General Setup option, and then press OK.
3. Press p or q to display the Ecology option, and then press OK.
4. Press p or q to display the Sleep Time option, and then press OK.
5. Using the dial pad, enter the length of time the machine (maximum 50 minutes) is idle before entering Sleep
Mode, and then press OK.
6. Press Cancel.

About Deep Sleep Mode
If the machine is in Sleep Mode and does not receive any jobs for certain length of time, based on your model and settings, the machine will automatically enter Deep Sleep Mode. You can set the length of time before the machine enters Deep Sleep Mode between 10 to 60 minutes. The default time is 11 minutes.
Deep Sleep Mode uses less power than Sleep Mode.

Machine's Control Panel in Deep Sleep Mode Conditions that will wake the machine
The LCD displays Deep Sleep. The machine receives a job.
Someone presses a button on the control panel.

Jesse, thanks, I had already read this. You might have missed my point. I want to prevent the printer from going into sleep mode.Sending a job to the printer is not "waking" the printer.

MATT.g,

Here is information for changing the setting. If this option is not there then, then you cannot turn it off.

1. Press Menu.

2. Press p or q to display the General Setup option, and then press OK.

3. Press p or q to display the Ecology option, and then press OK.

4. Press p or q to display the Auto Power Off option, and then press OK.

5. Press p or q to display the 8 hours, 4 hours, 2 hours, 1 hour, or off option, and then press OK.

6. Press Cancel.

Edit: MATT.G,

I found these youtube videos that may be worth watching. The first one seemed to resolve the issue, whereas the second one did not work for everyone.

You can click the link below to watch the YouTube Video on how to resolve the printer offline issue,.

How to Fix Printer Offline In Windows 8 and Windows 10

Below is another Video that helped some users resolve their Printer Offline Issue but, others it did not work,

Printer Offline in Windows 8 and Windows 10

My dell printer is now printing wirelessly and not showing "offline" after I followed the directions from the you tube video for Windows 10.  

I ended up turning on wifi direct which seemed to be a workaround for me.