User's Manual

ELATEC GmbH
Page 4 of 8
2.5 Normal Operation
As soon as the device has completed the initialization, it is entering normal
operation. During normal operation the device is searching for a transponder
continuously.
2.6 Detection of a Transponder
If a transponder is detected by the reader, following actions are performed
• Send the ID to the host. By default, the USB device sends by
emulating keystrokes of a keyboard. A RS232 device sends the
ASCII code of an ID.
• Sound a beep
• Turn off the green LED
• Blink the red LED for two seconds
• Turn on the green LED
Within the two seconds timeout, where the red LED is blinking, the
transponder, which just has been recognized will not be accepted again. This
prevents the reader from sending identical IDs more than one time to the
host.
If during the two seconds timeout of the red LED a different transponder is
detected, the complete sequence restarts immediately.
2.7 Suspend Mode
Once the host is resuming to normal operation mode, this is also signaled
via the USB bus. Therefore, the transponder reader will resume to normal
operation, too.