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4.2 Sensors
4.2.1
Paper sensors
The printer has two paper sensors.
4.2.1.1 Roll paper near-end sensor
The roll paper near-end sensor is to detect the condition when the remaining amount of the
paper is getting low and it is located on the roll paper supply unit. It detects the near-end of the
roll paper by detecting the roll paper diameter. You can adjust the sensor position. See page 2-6
for details for adjustment.
The normal printing task will be performed even in the near-end status.
Note:
The detecting the near-end status of the sensor does not necessarily indicate the complete end of the roll
paper. Use the sensor as an indication of replacing a roll paper.
4.2.1.2 Roll Paper End Sensor
The roll paper end sensor is located in the paper path. It detects the presence of paper through
the roll paper in the paper path.
When there is no paper in the path (paper end status), the ERROR LED and the PAPER OUT LED
indicator will light and it will be in the error status.
If the sensor detects the roll paper end, the printer will stop printing even in the process of
printing. It is recommended that you mainly use the roll paper near-end sensor and use the roll
paper end sensor secondarily.
4.2.2 Printer Cover Sensor
4.2.2.1 Roll Paper Cover Open Sensor
The cover-open sensor monitors the roll paper cover. When the sensor detects an open cover
while printing, the printer stops printing immediately and automatically goes offline.
Depending on the Msw 8-8 setting, an open cover error is handled as either a recoverable error
or unrecoverable error as described below.
❏ Msw 8-8 off:
❏ Msw 8-8 on: (Default)
4-8 Application Development Information
Automatically recoverable error. The ERROR LED flashes.
When the printer cover is closed, the ERROR LED goes off,
and the printer goes online and starts printing at the
beginning of the line it was printing when the cover was
opened.
Recoverable error. The ERROR LED flashes. Since the
ERROR LED still flashes after the cover is closed, send the
error recovery command to recover from the error.
Rev. B
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