Seiko Instruments SII Black-and-White Raster Plotter LP-1020 - Manual (Page 52)

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The device is “ONLINE” when it can receive and print data from the host
computer and is “OFFLINE” when settings are being input on the control
panel. You must set the device to “offline” to operate the menu from the
control panel.
Online
To print from the host computer, the device must be online. Always make
sure that the device is online to print from the host computer. If the device
is not online, follow the procedures below to set the device online. The
device will automatically go online when the device power is turned on.
1
Press the key to turn the Menu lamp off.
Offline
To select menu operations and paper feed method etc. using the device
control panel, the device must be offline. Before using the control panel
keys, set the device offline according to the following procedures.
1
Press the key to turn the Menu lamp on.
M E N U
# S E T U P
Online and offline
P R I N T R E A D Y