Epson LQ-950 User Manual - Page 285
Handshaking by DTR signal or X-on/X-off. The DTR signal changes, Space 0 +3 V to +27 V
View all Epson LQ-950 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 285 highlights
Signal level Mark (1) -3 V to -27 V Space (0) +3 V to +27 V Handshaking Handshaking by DTR signal or X-on/X-off. The DTR signal changes to mark-meaning the printer is not ready to receive data-when the number of bytes free in the input buffer goes down to 256. The signal changes to space-meaning that the printer is now readywhen the number of bytes in the input buffer rises to 528. Error handling A * character is printed if a parity error is detected. All other errors are ignored. Connector 6-pin DIN connector In this table, the direction of signals is given relative to the printer. nuPminber1 Sianal 1 dfbg,:fk 1 Direction I 1 TXD out Transmits data for X-on/X-off 2 DTR out Indicates whether or not the printer is ready to receive data. "Mark" level indicates printer is not ready to receive data. 3 RXD in Receives data 4 Not used 5 SG - 6 CG - Signal (logic) ground level Printer chassis ground 8-14 Technical Specifications