Star Micronics RS232 - Manual (Page 8)

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3-1. LED
LED Function
POWER Lights up when the printer is turned on.
Blinks when an error occurs (Refer to 7. ERRORS.)
ON LINE Lights up when the printer is on line; goes off when the printer
is off line or error occurs (Refer to 7. ERRORS.)
3-2. Switches
Switch Function
ON LINE Switches between on line and off line
FEED Feeds the paper while pressed
3-3. Switch Operation (Combined Switch Operation)
1)
FEED + POWER ON (Turn the power on while holding the FEED switch
depressed.)
Self-printing will be performed. VER. NO., Memory switch settings, DIP
switch settings and character order will be printed out.
2)
ON LINE + POWER ON (Turn the power on while holding the ON LINE
switch depressed.)
Each of the signals sent from the computer to the printer will be printed out
in hexadecimal code.
This function allows you to check if a control code sent to the printer by the
program being used is correct or not. The last line is not printed if its data is
less than one full line. However, if the ON LINE switch is pressed to set the
off line mode, the last line will be printed. To turn off the mode, it is necessary
to turn off the printer completely.
3. DISPLAY PANEL AND FUNCTIONS