9TVSL sign monitoring, reporting and alarm requirements#

9.1Sign monitoring and logs#

The DP shall monitor and log the following items in real-time as they occur:

  1. a)Log any SRC frame requests of the DP, including the unique identifier of the SRC requesting the speed change
  2. b)All RSCS software requests of the DP, including the RSCS username under which the request was made
  3. c)Loss of communications with the sign (noting the type of communication—for example, RSCS or Master / Slave)
  4. d)High internal sign enclosure temperature
  5. e)When the TVSL sign is set to blank and the blanking trigger description
  6. f)Report the GPS location of the sign from its installed position every 10 minutes
  7. g)Log an alarm when movement has been detected (GPS geo-fence, directional orientation and inclination angle)
  8. h)LED faults (LED pixel failures)
  9. i)Initialisation of TVSL (power up)
  10. j)When an SMS critical alert request has been transmitted by the DP
  11. k)Changed state of LFS (i.e., Blank Display, 40, 60, 80 and Remote modes)
  12. l)Low battery voltage (e.g., where the voltage of the power supply battery drops to a level that would prevent the battery from being recharged by the charging system)
  13. m)Loss of solar charge current / voltage
  14. n)Loss of load current
  15. o)Internal component faults (GPS and other modular hardware components), and
  16. p)All configuration changes shall include any user credentials associated with the change and respective ID (e.g., made through configuration or RSCS software).

The log shall identify the sign (through its respective sign ID) and its fault. The log shall include the date and time stamp for all entries and may be exported in a readily acceptable format, such as comma delimited text file (.csv), Microsoft Excel (.xls) or other formats as agreed with the project representative. Time shall be reported on the log file to centisecond (0.01s) accuracy or better.

The log shall also report the change of fault state. For example, when the fault condition has cleared and subsequently returns to normal operation.

The log file storage for the event log shall be sufficient to allow at least 12 months of continuous logging without overwriting. The log file storage shall be in the form of removable non-volatile memory module, such as an SD memory card. The oldest event record shall be overwritten first when the log file storage capacity has been exceeded.

For critical faults defined in Clause 9.3 below, the log shall include the RSCS or configuration software username ID which performed the acknowledgement and clearing of the fault.

Where a RSCS connection is in session, the RSCS software shall be synchronised and receive updates dynamically from the respective Master DP.

9.2Alarms#

Each sign shall be fitted with:

  1. a)a yellow flashing light (refer to Clause 10.2.2) on top of the sign, and
  2. b)an SMS Mobile Phone Alert system (referred to in Clauses 7.1 and 7.2)

Where critical faults occur:

  1. i.A yellow alert light (refer to Clause 10.2.2 below) on top of the sign shall flash until the fault is cleared through the RSCS or configuration software.
  2. ii.An SMS notification will be sent from the respective DP to pre-specified phone numbers with a clear description of the site, sign ID and a description of the fault.
  3. iii.If the sign is connected to the RSCS, an alarm shall also be generated on the user alarm monitoring interface.
  4. iv.The TVSL sign(s) display shall be blanked as shown in Appendix B.

9.3Critical faults#

Critical faults shall include the following.

  1. a)Movement of the sign after installation detected through:
  2. i.Monitored GPS location of the TVSL sign exceeding the installed location Geo-fence 30 m perimeter, or
  3. ii.Monitored Directional Compass position (if available) exceeds installed position by ± 20 degrees (yaw), or
  4. iii.Monitored inclination (if available) exceeds installed position by ± 5 degrees (roll or pitch)
  5. b)LED pixel faults (refer to 12.6).
  6. c)Low battery voltage level alarm – when the battery level falls to the specified DoD (e.g., indicating insufficient charge or problem with charging circuit). At this stage, the sign shall perform a graceful shutdown down in a controlled manner and as part of the shutdown process due to low power, the TVSL Sign flashing amber light shall be activated on each trailer.
  7. d)Charging Voltage too high – when the battery charge voltage exceeds the maximum charge voltage for the selected battery (e.g., indicating a possible battery charge regulator problem).
  8. e)If the DP has been requested to display a speed frame greater than what is permitted by the TGS for the TVSL site installation.
  9. f)Loss of solar module (e.g., open circuit detected on solar power charging circuit).
  10. g)Loss of load (e.g., possible disconnection of extension cable between trailer / concrete block and sign display.).
  11. h)Loss of communications – where a loss of communications occurs between the RSCS and the DP, then the RSCS software shall raise an alarm to the operator advising that the data displayed may no longer be valid as a result.
Source: MRTS260 · pages 25–27 Open PDF at this page Search this document