ML620/ML621 User’s Guide 65
MENU SETTINGS TABLE
Group Item Function Settings (defaults are set in bold italic)
Serial I/F
(cont.)
Baud Rate Set this to match your system’s 
transmission speed.
19200 bps, 9600 bps, 4800 bps, 
2400 bps, 1200 bps, 600 bps, 300 
bps
DSR Signal Used with the Ready/Busy 
protocol (factory default) to select 
the way your system handles the 
DSR signal.
Valid, Invalid
DTR Signal Change to Ready on Select if the 
DTR signal is required when the 
printer is selected (leave as Ready 
on Power Up if the DTR signal 
is required when the printer is 
turned on).
Ready on Power Up, Ready on 
Select
Busy Time Sets the length of the busy signal 
when the Ready/Busy protocol 
(factory default) is engaged,
0.2 sec, 1 sec
Stop Bit Set the stop bit length. 1 bit, 2 bit
Receive Error When “checked” is selected the 
printer checks for the correct 
number of bits and sends an error 
if an incorrect number is found.
Checked, Unchecked