CU Indicator
The CU indicator has 3 states which signal the following:
State Indication
OFF No contact to the control unit (no power) or the
contact has been broken for more than 1 minute
ON Contact with the control unit
BLINKING The printer is not ready and print may be pending in
the buffer.
LAN Indicator
The LAN indicator has 3 states which signal the following:
State Indication
OFF No communication with the Printserver on the
network.
ON LAN is connected
BLINKING LAN is searching for a connection (powerup phase)
PRT Indicator
The PRT indicator signals the following:
State Indication
OFF Data channel to printer is idle
ON Data is being transmitted to/from the printer
Host Connection
Be sure to turn the printer power OFF first, then plug the host cable into the socket on the rear panel.
3.2 Printer Operation
Many IBM printers are fully controlled from the front panel. To emulate the IBM front panel on the
Printserver, FSL (Function Selected via the Line) commands are required. These commands are sent
using FSL escape sequences. Information on the Escape Character used with FSL escape
sequences is found in the section on The Escape Character. The next chapter (Programming the
Printserver) describes the structure of the commands and their effect upon the printer.
If a change in paper size or CPI or LPI is made using the printer front panel this will take precedence
over changes made using FSL. At power up the printer values for these are parameters are sent to
the Printserver as default values.
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