Epson TM-U950P Specifications - Page 113

GS ENQ [Name] Transmit real-time printer status [Format] HH [Description] Transmits the real-time printer status upon receiving this command [Notes] The printer transmits only 1 byte without checking the DSR signal. This command is executed even if the printer is in the off-line state, in the receive buffer full state, or in the mechanical error state. The printer status is transmitted whenever the data sequence of HH is received. Example: In ESC p m t1 t2: t1 = H, t2 = H * In ESC m nL nH d1...dk: d1 = H, d2 = H This command should not be used within the data sequence of another command that consists of two or more bytes. Example: If you attempt to transmit ESC 3 n to the printer, be sure to transmit n before transmitting GS ENQ regardless of the condition of the DTR signal (DSR for the host computer). If GS ENQ interrupts before n is received, n is processed as H. The command should not be used with handshaking of 7-bit data word length and XON/XOFF control. Otherwise, the status transmitted using this command cannot be differentiated from the XON/XOFF codes. When Auto Status Back (ASB) is enabled using GS a, the status transmitted by GS ENQ and the ASB status must be differentiated, using the table in APPENDIX B, Transmit Status Identification. Bit Function Value 0 1 0 Journal near-end sensor Paper present No paper 1 Receipt near-end sensor Paper present No paper 2 Cover open/close Close Open 3 On-line/Off-line On-line Off-line 4 Drawer kick-out connector pin 3 LOW HIGH 5 Slip insertion sensor Paper present No paper 6 Error No error Error occurs 7 Not used Fixed to 1 TITLE EPSON TM-U950/U950P Specification (STANDARD) SHEET REVISION NO. NEXT A 8853 SHEET 824