*: If the firmware version is 40.50 ESC/POS or later, a barcode scanner can also be connected. See the detailed information on "Compatibility with USB Type-A" on page 157 . Online and Offline Online The printer is online and ready for normal printing unless there is a reason to go offline. Offline The printer automatically goes offline under the following conditions:
• While the printer power is turning on/off • While a self-test is running • While roll paper is fed using the Feed button • When the printer stops printing due to a paper end (when the paper out detector detected the paper out) • During an operation standby state • When an error has occurred (See "Status and Errors" on page 21 ) • While the roll paper cover is open 20 7 USB connector Use only for connecting optional Wireless LAN unit and customer display.* CAUTION: It may be hard to disconnect some types of USB cable. Do not forcibly pull the cable, or the USB connector and USB cable may be damaged. Contact qualified service personnel if you encounter the trouble.
8 USB connector (Type B) Connects the USB cable for connecting to a computer. See "Connecting the Printer to the Host" on page 33.