Rockwell Automation 2755-G3-W_G6-W Scanner with Wedge Option - Manual (Page 55)

Symbologies
Chapter 7
7–2
To disable Code 39, scan label OA.
OA Disable Code 39
To enable Code 39, scan option OB or OC. After
enabling Code 39, make any additional required
selections from options OD through OI.
OB Enable Standard Code 39 *
OC Enable Full ASCII Code 39
Code 39