Epson TM-U950P Specifications - Page 110

ESC v [Name] Transmit paper sensor status [Format] HH [Description] Transmits the current paper sensor status [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. The 1 byte status data is transmitted after printing and paper feed operation completely stop (transmit timing differs from ESC u, GS I, and GS r). 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, using the table in APPENDIX B. The status to be transmitted is shown in the table below: Bit Function Value 0 1 0 Journal near-end Paper present No paper 1 Receipt near-end Paper present No paper 2 Journal end Paper present No paper 3 Receipt end Paper present No paper 4 Not used Fixed to 0 5 Slip insertion sensor Paper present No paper 6 Slip ejection sensor Paper present No paper 7 Not used Fixed to 0 [Reference] DLE EOT, GS ENQ, GS a, GS r, APPENDIX B, Transmit Status Identification TITLE EPSON TM-U950/U950P Specification (STANDARD) SHEET REVISION NO. NEXT A 8820 SHEET 7891