MagTek MINIWEDGE SWIPE READER - Manual (Page 27)

Section 3. Operation
21
If it is necessary to place a carriage return (0x0D) after each track (+0x80), the following command can
be used.
Send <cr> after each track:
MWPW022=8D
Response:
WP8D
DATA ERROR CONDITIONS
There are only a few conditions that will produce an error. The only Reader related condition is invalid
card data. If the Reader detects Start Sentinel but cannot decode the information on the magnetic stripe,
the LED illuminates red. The Reader will send any valid track(s) of data that it finds. If it only finds two
valid tracks and the other track is invalid, then the valid tracks will be sent, and the LED will illuminate
red for the invalid track.