GENERAL DESCRIPTION
REV.-A
1.8.4 ERROR CONDITIONS
If any of the following error conditions are detected, the printer automatically enters off-line mode.
0 Home position is not detected at printer mechanism initialization.
0 Home position is detected during printing.
l
ON LINE is pressed when the printer is already on line. This will switch the printer to off line.
0 When a paper-out signal is detected and forms-override is finished.
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If “paper out” is detected after the printer performs a paper-loading operation with the cut-sheet feeder
enabled.
The following interface signals are output to indicate the error and to halt data transmission:
BUSY signal becomes HIGH.
ERROR becomes LOW.
No ACKNLG pulse is sent.
1.8.5 BUZZER OPERATION
The buzzer operates as follows:
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When the BEL code is sent to the printer, the buzzer sounds continuously for 0.5 seconds.
0
When the paper-out error is detected, the buzzer sounds 3 times, for 0.1 second each time. The interval
between sounds is 0.1 second.
0
When abnormal carriage movement is detected, the buzzer sounds 5 times, for 0.5 seconds each time.
The interval between sounds is 0.5 seconds.
0 When the panel setting is accepted, the buzzer sounds for 0.1 second.
1.8.6 PRINTER INITIALIZATION
There are two types of initialization: hardware initialization and software initialization.
Hardware Initialization
Hardware initialization occurs when the printer power switch is turned on (provided that the AC power cord
is plugged in), or when the INIT signal is received over the parallel interface line.
Upon hardware initialization, the printer does the following:
(a) Initializes the printer mechanism.
(b) Clears the input data buffer.
(c) Clears the downloaded character set.
(d) Clears the print buffer.
(e) Returns the printer settings to their default values.
Software Initialization
Software initialization occurs when the printer receives the software initialize code. For a software initializa-
tion, the printer does not perform the functions listed under (a), (b), and (c) above. Instead, the settings changed
by the last SelecType operation are reset.
1-22
LQ-510
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