I also have the Midiverb 3 by Alesis and according to the program chart, you can get 100ms delay, 300ms delay and 490ms delay.
So, I don't think you can get 200.
If you punch in 052 which is 300 ms delay, the reverb is included in the patch; you can go into the edit mode of the the midiverb 3 and make some changes; you'll have to try that yourself and see what you can punch up.