Citizen Systems iDP-3550 - Manual (Page 117)

ESC "v"
[Function] Sending the printer status
[Code] <1B>H <76>H
[Outline] This command sends the printer status.
[Caution] This command is valid only for the serial interface. The following table lists the status sent.
In case of DTR/DSR control, only one byte will be sent after confirming that the host is ready
to receive (DSR signal has the Space status).
The status at command processing time is sent after processing the data received prior to this
command. If the printing is under way when the command is being processed, however, the
then status will be sent after completing print feed of that line. Therefore, it may take time to
send the status after receiving the command.
Value
Bit Function
0 1
0 Paper near end With paper Near end
1 Undefined
2 Paper near end With paper End
3 Undefined
4 Undefined 0 stationary
−
5 Undefined
6 Undefined