Epson TM-U950P Specifications - Page 109

ESC u n [Name] Transmit peripheral device status [Format] HH [Range] n = 0, 48 [Description] Transmits the status of connector pin n upon receiving this command The value of n is set as follows: n Connector pin 0, 48 Drawer kick-out connector pin 3 [Notes] When the connector is not used, the value of bit 0 is always 1. 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 keeps waiting 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 u and the ASB status must be differentiated, using the table in APPENDIX B. If the value of n is out of the specified range, the printer ignores the command. The status to be transmitted is shown in the table below. Bit 0 Pin 3 level 1 Undefined 2 Undefined 3 Undefined Function Value 0 1 LOW HIGH 4 Not used 5 Undefined 6 Undefined 7 Not used Fixed to 0 Fixed to 0 [Reference] DLE EOT, GS ENQ, GS a, GS r Section 2.2.3, Drawer kick-out connector APPENDIX B, Transmit Status Identification TITLE EPSON TM-U950/U950P Specification (STANDARD) SHEET REVISION NO. NEXT A 8719 SHEET 7880