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l
Battery charge status
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Active and historical fault data
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Wheelchair driving time
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Information about the modules attached to the wheelchair (e.g., module serial numbers)
The information updates once every 12 hours when connected or when requested by an application on the iOS device. Note the
wheelchair may be in motion at the time of transmission.
10.3.2 Configuration
The LiNX Programming and Diagnostic (P&D) tools use Bluetooth to communicate with the LiNX control system via the LiNX Access
Key (LAK). The LAK is a standalone device that plugs into a remote module. A system cannot be configured without using the LAK
and only manufacturers, trained providers, dealers, therapists or clinicians have access to the LAK. This means that end users, their
friends, relatives or caregivers cannot change the configuration.
There are two levels of access:
l
Manufacturer (or OEM)
l
Distributor (provider/clinician)
The levels of access permit the following:
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LAK Manufacturer Level
With this level, the manufacturer sets the system's default parameters to suit a particular wheelchair.
l
LAK Distributor Level
With this level, a subset of the system's parameters is configured by trained providers, dealers, clinicians or therapists. Critical
parameters are limited within a predetermined range as set by the manufacturer.
Although the wheelchair may be in motion when the system is being configured, instructions for safe use, training and built-in
safety mechanisms minimize the potential for non-life threatening injuries resulting from inappropriate configuration of the
wheelchair. The likelihood of the aforementioned hazardous situation occurring is remote. A human intermediary, knowledgeable in
the control system and specific user needs, can intervene to prevent harm to the wheelchair user during wheelchair setup.
The P&D tools do not allow direct control of the LiNX wheelchair. Complete control of the wheelchair remains with the end-user at
all times. Should a user determine during the customization process that the wheelchair setup is inappropriate in providing full
control in everyday usage, they may return the joystick to the neutral position and the wheelchair will come to a complete and safe
stop in a controlled manner.
Similarly, the user, provider, therapist or clinician may at any time turn off the control system using the power button/s within the
system (for example, on the primary remote module or the attendant control unit). Such action will also bring the wheelchair to a
complete and safe stop in a controlled manner.
10.4 Quality of Service
As per the risk assessment, none of these items can cause or contribute to a safety hazard should the data link be compromised.
Data latency and/or the probability of loss of service creates an inconvenience only and does not inhibit the user’s therapy or
treatment.
10.4.1 Data Integrity
Errors in the integrity of the data transmitted are a nuisance and will not cause a safety-related issue. Data is not used for clinical
purposes.
Loss of or incorrect data transmitted in Mouse Mover mode could result in the loss of or incorrect movement of the user’s PC
cursor. Similar conditions exist with normal off-the-shelf USB or wireless PC mice when their batteries are low.
Loss of diagnostic data transmitted could result in a gap in historical information presented to a service technician. Errors in the
wheelchair-specific diagnostic information could result in short-term erroneous information being presented to a technician. Both
conditions may result in wheelchair troubleshooting taking longer than initially estimated.
Loss of configuration data transmitted in programming and diagnostic mode would result in no effect. The existing wheelchair
configuration would be maintained. Errors in the configuration data transmitted would be rejected by built-in safety mechanisms
and/or detected during the subsequent evaluation of the configuration updates through the prescribed user testing.
10 Wireless Technology