User manual
APOS Premium Printer Series User Manual Page 85 /136 Reference: FDE 3107312 Issue A
S
ELECT OR CANCEL UNSOLICITED STATUS MODE (USM)
Selects whether the printer is to automatically return a 4 bytes status string whenever the status changes.
ASCII
GS a n
Hexadecimal 1D 61 n
Decimal
29 97 n
Value of n
0 turns mode off
Any non-zero value turns mode on
Default
n = 0 (USM disabled)
Byte 1 = Printer information
Byte 2 = Error information
Byte 3 = Paper information
Byte 4 = Paper information
This command uses the same sequence as older ASB (Auto Status Back) but has the following differences:
• The parameter n is an on/off switch. It does not select trigger subset
• There is no immediate return when this mode is turned on
Any change in any of the following conditions will trigger the USM response
• Receipt Cover
• Knife Error
• Out of range Print head Temperature
• Out of range Voltage
• Paper exhaust Status
• Flow Control
• Paper Feed Button Status
• CDKO Status