You seem to know what your doing with the DL in the past, with your training and workouts. If your going for a PR (personal record) of 7 plates, after time away from that lift, might suggest going back up slowly. Try not rushing the weight on the bar too much. DL's can be very unforgiving it not fully ready for them. with pulled muscles, ligaments & tendons. Not to mention doing damage to the ego. Had you done 7 plates in the past, in a regular training (singles, doubles, etc)?
If doing that 5 plate thing rather easily, might suggest taking a jump up with around a 40lb increase and a few more reps than you might normally do in a workout. If that 40 seems smooth enough, than slap on another 20lbs for the final set. If that 20lbs seemed a bit rough than do another set back with the 40lbs again.You don't want to struggle when getting the body back in a more serious lifting mood, might do more harm than good.
Again, you don't want to rush the weight on the bar. With that testing of the 5 plate DL, jumping to a 90lbs (2 plates) increase (after being away from the DL) for the next workout may not be the best plan. 7 plates is a good lift for a 220 lifter. Just suggesting the adapting of the body, and mental approach, may require a bit more time on your part, with the other goal being not to get any unneeded injury's to set back you progress along the way. Sitting out 3 to 5 months, while you recover from a torn this or that, is not in anyone's future plans. DL's can produce some very unexpected surprises from time to time.
Good Luck