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5-34 Commands
[Notes] • When DTR/DSR control is selected, the printer transmits only 1
byte after confirming that the host is ready to receive data (DSR
signal is SPACE).
If the host computer is not ready to receive data (DSR signal is
MARK), the printer waits until the host is ready. When XON/
XOFF control is selected, the printer transmits only 1 byte without
checking the DSR signal.
• This command is executed when the data is processed in the
receive buffer. Therefore, there may be a time lag between
receiving the command and transmitting the status, depending on
the receive buffer status.
• When Auto Status Back (ASB) is enabled using GS a, the status
transmitted by ESC v and the ASB status must be differentiated.
• The status to be transmitted is shown in the table below:
Bits 2and 3: When the paper roll end sensor detects a paper end, the printer goes
off-line and does not execute this command. Therefore, bits 2 and 3
do not transmit the status of paper end.
[Reference] DLE EOT, GS a, GS r
ESC {
n
[Name] Turns on/off upside-down printing mode
[Format] ASCII ESC {
n
Hex 1B 7B
n
Decimal 27 123
n
[Range] 0
≤
n
≤
255
[Description] Turns upside-down printing mode on or off.
Bit Off/On Hex Decimal Function
0
1
Off 00 0
Paper roll near-end sensor. Paper is
present.
On 03 3
Paper roll near-end sensor.
Paper is not present.
2
3
Off 00 0
Paper roll end sensor.
Paper is present.
On (0C) (12)
Paper roll end sensor.
Paper is not present.
4 Off 00 0 Not used. Fixed to Off.
5 - - - Undefined.
6 - - - Undefined.
7 Off 00 0 Not used. Fixed to Off.