Opticon PX 20 v37938 Batch demo Quick Guide - Manual (Page 15)

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11.1 Trouble shooting
Since the barcode readers don't have a display, they also don't have a system menu to resort to when a crashing
application or OS prevents you from loading new software on your barcode reader.
For this reason the barcode readers have a few escape mechanisms to allow you to restart, halt your application,
and/or install new software. This can be very useful in case the barcode reader has crashed or is restarting due to a
crashing application or OS.
11.1.1 Restart mechanisms
Automatic
The barcode readers have a watchdog timer to determine whether the OS is
still running or has crashed. This watchdog will cause the device to restart
after about 1 second if the OS has crashed. This watchdog timer will not
cause a restart when only the application has crashed.
Manually
The barcode readers have a manual restart mechanism that allows you to
restart in situations that the OS is still running, but the application has
crashed. In order to activate this mechanism, press and hold both the trigger
and delete key for at least 20 seconds. After the barcode reader has sounded
a short beep, you can release both keys to complete the restart.
11.1.2 Halting your application
 Restart your application using one of the two restart methods listed above, but keep both keys pressed after the
short beep.
 Release the trigger key first to halt the application.
If successful, the LED of your barcode reader should now be blinking orange. You should now be able to load new
application or OS software.
To exit the halted application state, press both keys for 20 seconds.
11.1.3 Halting the Operating System (only required if a corrupt OS is installed)
 Restart your application using one of the 2 methods listed above, but keep both keys pressed after the short
beep.
 Release the clear key first to halt the operating system.
If successful, the LED of your barcode reader should now be blinking red. You should now be able to load a new OS.
To exit the halted operating system state, press both keys for 3 seconds.