A status byte can also be requested by sending the CMD_STATUS command to the SLP Pro. The SLP Pro sends a status byte (unsolicited) to the host computer whenever there is a change in its internal copy of the status byte. This is because the host must send commands and data, while the SLP Pro sends only XON/XOFF handshaking and an occasional status byte. The primary communication flow is from the host to the SLP Pro. The printer's baud rate is always set to 9600 baud after power-up and after receiving a reset command. Note that the host may change the baud rate to 19,200 or 38,400 by sending a special command to the printer. The host communications port is normally configured for 9600 baud, no parity, 8 data bits, and 1 stop bit. The host end of the cable is intended for DTE connections using either DB-25 or DB-9 connectors. The supplied cable connects the TX, RX, GND, and DSR signals to the printer via a standard RJ11 type (modular telephone) connector. The SLP Pro communicates with the host computer over a serial (RS-232) line. The command set is very lean in order to allow the printer to concentrate only on printing and off-load the other functions to the host. The SLP Pro is actually a bitmapped device that prints all information on the label (including text) as graphic images. The Smart Label Printer Pro, or SLP Pro, is a very small printer which is dedicated (as the name implies) to printing labels. This document describes the interface between the Smart Label Printer Pro and a host computer system.
SEIKO Precision UK | Frequently Asked Questions
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