
ATB1200 User Guide Page 11 of 15
6
USER FEED SWITCH AND LED
6.1
FRONT PANEL CONNECTION DETAILS
The ATB1200 has provision for fitting an external Paper Feed Button and LED. These two functions
are combined into a single connection. The circuit for this connection may be represented as follows:
N.B. The signals represented as A and B in this diagram are not easily accessible on the Revision 8
PCB. The signals exist on the PCB, but are not brought to a convenient connector. The system
integrator may, if required, wire directly on to signal A, and use an external connection to SGND.
Signal A may be found on the Revision 8 PCB at the location where pin 30 of the mechanism
connector J3 would be if a 30-way connector were fitted. No connection is normally made to this
point on the PCB. Please refer to the factory for more information if required.
6.2
PAPER FEED SWITCH
(N.B. This function is not easily accessible on the Revision 8 PCB. See above)
Pressing the paper feed switch when the printer is idle advances paper at up to 50 mm per second,
depending on the voltage supplied. However, the feed switch has several additional functions:
§
A single press and release of the switch:
in idle or spooling mode, advances paper (in steps of 1/16 mm);
§
"Double-clicking*" the switch:
in idle mode, prints a demo/test message including the firmware version, encoded
calibration data, and the full character set;
in spooling mode, or having been out of paper, prints any stored data and enters idle
mode.
* Double-clicking means pressing and releasing twice in quick succession like a PC mouse button.
Some of the functions of the paper feed switch can be invoked or disabled under control of the host.
The LED is extinguished while the Paper Feed switch is being pressed.
6.3
LED INDICATIONS
(N.B. This function is not easily accessible on the Revision 8 PCB. See above)
The LED indicates the following printer conditions:
§
Steady illumination means that all is normal.
§
Flashing on and off indicates either:
the printer is out of paper
the mechanism is not closed
or a combination of the two
§
Very rapid flashing indicates the power supply voltage is too low.
§
No light indicates that the unit has no power.
The LED is extinguished while the Paper Feed button is being pressed.
Other LED patterns may be programmed into the ATB1200 on request or by the system designer.
Please refer to the Programmers Guide for details of how to set up these functions.