PYLE Audio PP5600 - Manual (Page 20)

2 - 8
Positions 1 to 6 of the S2 switch define the communication
protocol and handshaking criteria in RS232 interface. They shall
always be set to positions 1 to 4 OFF with position 5 set to ON for
parallel interface application.
Position 7 of S2 alters the horizontal spacing between
characters to get different print density on same font format.
Position 8 of S2 determines whether to print only in one
direction of print head operation or in both directions.
All positions of S2 default to OFF when printer delivered.
3.
Wall mount application
In wall mount application, the paper near end sensor will
not have proper operation and it is suggested not to install it.