If buttons one, two and three are released while the VFD is rapidly blinking (< 10 seconds),
all three channels will be cleared of data. When one of these channels is subsequently
activated, the device shall immediately enter the learn mode of operation.
To operate the Homelink unit in the rolling code default mode, the user shall activate one
of the three transmit buttons. The Homelink unit shall determine which button has been
activated and using a pre-determined code-hopping algorithm, bit period and frequency
(see Appendix B for details) shall transmit such data with the VFD indicator rapidly blinking
(4Hz ± 10%) for 2 ± 10% seconds followed by continuous illumination.
Homelink Learn Mode of Operation
The Homelink system can learn up to three (3) separate garage door opener (GDO)
systems. To train a GDO transmitter to the Homelink system, the user shall complete
the following steps:
* select one of three channels by selecting 1 of three transmit buttons. If more
than one channel is selected at one time, the Homelink shall give the lowest
numbered channel highest priority. For example if channel 2 and 3 are
selected, channel 2 shall have the higher priority.
* hold a transmit button for twenty (20 ± 10%) seconds at which time the learn
mode shall be indicated. The Homelink shall be in learn mode only if the VFD
indicator is blinking at a rate of lHz ±10%. (The Homelink shall immediately
enter learn mode if the selected channel is determined to be clear of data. See
1.2.4)
* hold the present GDO transmitter near the Homelink. The Homelink shall
train when the OT is held within 1 inch, and shall not train if the OT is held more
than 3 feet away from the unit. Once in learn mode, the training process will be
complete in <= 90 seconds and shall be indicated by rapidly blinking the VFD (4Hz
± l0%) 40 times. After completion the VFD indicator shall be off.
* the data containing the frequency of operation and security code information
shall be stored in non-volatile memory (NVM).
Homelink Clear Mode of Operation
The NVM of the Homelink can be completely erased by simultaneously holding down
buttons one and three for 20 ± 10% seconds. Successful erasure of the memory shall be
indicated by rapidly blinking the VFD indicator (4Hz ± 10%) 40 times.
* If buttons one and three are released while the VFD indicator is blinking rapidly
(< 10 seconds), all three channels shall be cleared of data. When one of these
channels is subsequently activated, the device shall immediately enter learn
mode of operation.
* If buttons one and three are continually activated for more than 1 0 seconds at;:
the rapid blinking starts, the VFD indicator shall be off. When one of these
channels is subsequently activated, the device shall immediately enter default
mode of operation.
* If buttons one, two, and three are continually activated for more than 10
seconds after the rapid blinking starts, the VFD indicator shall be off. When one
of these channels is subsequently activated, the device shall immediately enter
rolling code default mode of operation.
