Diagnostic screens

 

Diagnostic screens let you view information about system activity. From these screens you can view:

  • live diagnostics
  • the system summary
  • the chair log – active and previous errors
  • chair statistics

Live diagnostics overview

Diagnostic screens are accessed by tapping on the Live Diagnostics button on the Home screen.

There are five types of live diagnostic screens available when the LiNX Access iOS tool is connected to a wheelchair — they are:

  • Live diagnostics — Drive

  • Live diagnostics — Angle Sensor

  • Live diagnostics — Angle Sources

  • Live diagnostics — Actuator Channels

  • Live diagnostics — Control Inputs
NOTE 1. The type of diagnostic screen available depends on your configuration. For example, if there are no angle sources in your configuration, then Angle Sources will not be displayed.
2. The Live Diagnostic screens, Actuator Channels, and Control Inputs can only be viewed with devices running iOS 16.0 or higher.

 

Live diagnostics — Drive

When connected to a wheelchair, tap Live Diagnostics | Drive to view real-time graphs and data:

  • Speed Demand (%)
  • Turn Demand (%)
  • Left Motor
    • Voltage (V)
    • Current (A)
    • Resistance (mΩ)
  • Right Motor
    • Voltage (V)
    • Current (A)
    • Resistance (mΩ)
  • Battery Voltage (V)
  • Speed Dial (%)

Note: Tap Back to exit the diagnostics

 

Live diagnostics — Angle Sensor

When connected to a wheelchair, and if one or more angle sensors are configured and enabled, tap Live Diagnostics and then select an angle sensor to view a real-time graph of the selected angle sensor's angle.

 

Live diagnostics — Angle Sources

Tap Live Diagnostics and then select an angle source to view a real-time graph and numerical display of the selected angle source's angle. Note: only available if one or more angle sources are configured.

 

Tap Back to exit Angle Sources diagnostics.

Live diagnostics — Actuator Channels

Tap Live Diagnostics and then select an actuator channel to view its:

  • real-time current graph

  • real-time direction and current (amps)

  • minimum and maximum current (amps).

 

Tap Back to exit Actuator Channels diagnostics.

 

NOTE This screen can only be viewed on a device running iOS 16.0 or higher.

Live diagnostics — Control Inputs

Tap Live Diagnostics and then select a control input to view its:

  • status message
  • measured resistance value (ohms)

 

Tap Back to exit Control Inputs diagnostics.

 

Note that each control input is displayed across two rows in the table (see image below): the first is its status message, the second is its measured resistance value.

 

 

NOTE This screen can only be viewed on a device running iOS 16.0 or higher.

If any measured resistance does not correspond to a switched resistance band (see table, below), that is, band 0–16 has not been detected, the status message row will display one of the following:

  • Invalid — monitored: invalid band
  • Failsafe Open Circuit — monitored: open circuit
  • Open Circuit — monitored: invalid band
  • Unstable — input is not stable
  • Error/Unknown — displayed when an error occurs, or the input port is not configured for a control input

 

For any of the above status messages, the resistance displayed in the measured resistance value row will have no meaning and can be ignored.

If the measured resistance corresponds to one of the resistance bands (band 0–16 listed in the table below), the status row displays the detected resistance band (Band 1, Band 2 etc), and the resistance value row displays the actual resistance at the input, corresponding to the band displayed in the first row.

 

Resistor band ranges

 
Band

Lower limit

(including)

 Nominal Upper limit
(excluding)
Band 0 (monitored: short circuit) 0 - 17
Band 1 17 34 51
Band 2 51 68 85
Band 3 85 102 119
Band 4 119 136 153
Band 5 153 170 187
Band 6 187 204 221
Band 7 221 238 255
Band 8 255 272 289
Band 9 289 306 323
Band 10 323 340 357
Band 11 357 374 391
Band 12 391 408 425
Band 13 425 442 459
Band 14 459 476 493
Band 15 493 510 527
Band 16 527 544 578

The system summary

Tap System Summary to view the System Summary screen.

The System Summary screen displays details of the system's connected modules and tools, such as:

  • a connected module's identifier
  • a module's software version
  • a module's serial number
  • the access level of the LiNX Access Key

A link to the Dynamic Controls website is at the bottom of the screen.

System status

The system status displays what errors (if any) are currently active.

Tapping on the system status gives you access to:

  • chair log
  • chair statistics
 

The chair log

Tap Active Errors, then tap Chair Log to display:

  • a list of active errors
  • a list of previous errors in the event log

Each entry in the log displays the error, its flash code (e.g. FC 3:7), and the component where the error occurred.

Tap an error entry to view further information on the error.

You can clear the event log by scrolling to the bottom of the list and tapping Clear Event Log.
 

Chair statistics

Tap Statistics to view current system statistics.

 The statistics screen is divided into the following sections:

  • Battery usage
  • Drive statistics

Battery usage

The battery usage statistics are in the top section of the statistics screen.

  • To view more information about a battery usage statistic, tap the statistic, and a description displays under it.
  • To reset the statistics, click Reset Battery Usage at the bottom of the battery usage section.

Available battery usage statistics are detailed in the table below:

Battery usage statistics

Details

Battery Charging Time

The time that the batteries have been charged for

Number of Charge Cycles

The number of times the batteries have been charged

Band 1 Indicator Time

The total time the LiNX system is operated with the state of charge between 0 and 20%

Band 2 Indicator Time

The total time the LiNX system is operated with the state of charge between 20% and 40%

Band 3 Indicator Time

The total time the LiNX system is operated with the state of charge between 40% and 60%

Band 4 Indicator Time

The total time the LiNX system is operated with the state of charge between 60% and 80%

Band 5 Indicator Time

The total time the LiNX system is operated with the state of charge between 80% and 100%

Average Battery Voltage

The average battery voltage over the last 31 days

Last Charge Timestamp

The date and time when the batteries were last put on charge

Number of High Battery Events

The number of high battery warnings

Number of Low Battery Events

The number of low battery warnings

Number of Deep Discharge Warnings

The number of deep discharge warnings

Battery Usage Last Reset

Date when these statistics were last reset

Drive statistics

The drive statistics are in the lower section of the statistics screen, below the battery statistics.

  • To view more information about a drive statistic, tap a statistic, and a description displays below it.
  • To reset the statistics, click Reset Drive Statistics at the bottom of the drive statistics section.

Drive statistic

Details

Average Motor Current

The average current drawn across all motors while driving

Maximum Left Motor Current

The peak measured motor current

Maximum Left Motor Current Time

Time spent drawing the "Maximum Drive Current Draw"

Maximum Right Motor Current

The peak measured motor current

Maximum Right Motor Current Time

Time spent drawing the "Maximum Drive Current Draw"

Powered Up Time

The total time the wheelchair controller is powered up

Drive Time

The total time the wheelchair has been driven

Average Drive Time

Average drive time

Time Near Maximum Current

The duration the current was within 20% of maximum threshold

Trip Distance

The total distance travelled by this wheelchair in meters since being reset by the user.

Total Distance Travelled

The total distance travelled by this wheelchair since being reset by a service agent.

Drive Statistics Last Reset

Date when these statistics were last reset