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Appendix 1

United Kingdom

Original text. Later amendments are not shown.

Compatibility between tractors and towed vehicles with respect to ISO 11992 data communications

1.

General

1.1.

The requirements of this Appendix shall only apply to tractors and towed vehicles equipped with an electric control line.

1.2.

The ISO 7638 connector provides a power supply for the braking system or anti-lock braking system of the towed vehicle. In the case of vehicles equipped with an electric control line this connector also provides a data communication interface via Pins 6 and 7 as in point 2.1 of this Annex.

1.3.

This Appendix lays down requirements applicable to the tractor and towed vehicle with respect to the support of messages defined within ISO 11992-2:2003 including Amd.1:2007.

2.

The parameters defined within ISO 11992-2:2003 including Amd.1:2007 that are transmitted by the electric control line shall be supported as follows:

  1. 2.1.

    The following functions and associated messages are those specified within this Regulation that shall be supported by the tractor or towed vehicle as appropriate:

    1. 2.1.1.

      Messages transmitted from the tractor to the towed vehicle:

      Function/ParameterISO 11992-2:2003ReferenceReference in this Regulation
      Service/secondary brake demand value

      EBS11

      Byte 3-4

      		Appendix 1 to Annex II, point 3.1.3.2.
      Two electrical circuits brake demand value

      EBS12

      Byte 3 Bit 1-2

      		Annex XII, point 3.1.
      Pneumatic control line

      EBS12

      Byte 3 Bit 5-6

      		Annex XII, point 3.1.
    2. 2.1.2.

      Messages transmitted from the towed vehicle to the tractor:

      Function/ParameterISO 11992-2:2003ReferenceReference in this Regulation
      Vehicle electrical supply sufficient/insufficient

      EBS22 Byte 2

      Bit 1-2

      		Annex XII, point 5.2.3.
      Warning signal request

      EBS22 Byte 2

      Bit 3-4

      		Annex XII, point 4.2.3., 5.2.4. and 5.2.3.
      Supply line braking request

      EBS22 Byte 4

      Bit 3-4

      		Annex XII, point 4.2.2.
      Stop lamps request

      EBS22 Byte 4

      Bit 5-6

      		Annex XII, point 5.2.5.1.
      Vehicle pneumatic supply sufficient/insufficient

      EBS23 Byte 1

      Bit 7-8

      		Annex XII, point 5.2.4.
  2. 2.2.

    When the towed vehicle transmits the following message, the tractor shall provide a warning to the driver:

    Function/ParameterISO 11992-2:2003ReferenceDriver Warning Required
    Warning signal request

    EBS22 Byte 2

    Bit 3-4

    		point 2.2.1.29.2.1 of Annex I
  3. 2.3.

    The following messages defined in ISO 11992-2:2003 including Amd.1:2007 shall be supported by the tractor or towed vehicle:

    1. 2.3.1.

      Messages transmitted from the tractor to the towed vehicle:

      No messages currently defined.

    2. 2.3.2.

      Messages transmitted from the towed vehicle to the tractor:

      Function/ParameterISO 11992-2:2003Reference
      Vehicle service brake active/passiveEBS22 Byte 1, Bit 5-6
      Braking via electric control line supportedEBS22 Byte 4, Bit 7-8
      Geometric data indexEBS24 Byte 1
      Geometric data index contentEBS24 Byte 2
  4. 2.4.

    The following messages shall be supported by the tractor or towed vehicle as appropriate when the vehicle is installed with a function associated with that parameter:

    1. 2.4.1.

      Messages transmitted from the tractor to the towed vehicle:

      Function/ParameterISO 11992-2:2003Reference
      Vehicle typeEBS11 Byte 2, Bit 3-4
      VDC (Vehicle Dynamic Control) Active/passiveEBS11 Byte 2, Bit 5-6
      Brake demand value for front or left side of vehicleEBS11 Byte 7
      Brake demand value for rear or right side of vehicleEBS11 Byte 8
      ROP (Roll Over Protection) system enabled/disabledEBS12 Byte 1, Bit 3-4
      YC (Yaw Control) system enabled/disabledEBS12 Byte 1, Bit 5-6
      Enable/disable towed vehicle ROP (Roll Over Protection) systemEBS12 Byte 2, Bit 1-2
      Enable/disable towed vehicle YC (Yaw Control) systemEBS12 Byte 2, Bit 3-4
      Traction help requestRGE11 Byte 1, Bit 7-8
      Lift axle 1 — position requestRGE11 Byte 2, Bit 1-2
      Lift axle 2 — position requestRGE11 Byte 2, Bit 3-4
      Steering axle locking requestRGE11 Byte 2, Bit 5-6
      SecondsTD11 Byte 1
      MinutesTD11 Byte 2
      HoursTD11 Byte 3
      MonthsTD11 Byte 4
      DayTD11 Byte 5
      YearTD11 Byte 6
      Local minute offsetTD11 Byte 7
      Local hour offsetTD11 Byte 8
    2. 2.4.2.

      Messages transmitted from the towed vehicle to the tractor:

      Function/ParameterISO 11992-2:2003Reference
      Support of side or axle wise brake force distributionEBS21 Byte 2, Bit 3-4
      Wheel based vehicle speedEBS21 Byte 3-4
      Lateral accelerationEBS21 Byte 8
      Vehicle ABS active/passiveEBS22 Byte 1, Bit 1-2
      Amber warning signal requestEBS22 Byte 2, Bit 5-6
      Vehicle typeEBS22 Byte 3, Bit 5-6
      Loading ramp approach assistanceEBS22 Byte 4, Bit 1-2
      Axle load sumEBS22 Byte 5-6
      Tyre pressure sufficient/insufficientEBS23 Byte 1, Bit 1-2
      Brake lining sufficient/insufficientEBS23 Byte 1, Bit 3-4
      Brake temperature statusEBS23 Byte 1, Bit 5-6
      Tyre/wheel identification (pressure)EBS23 Byte 2
      Tyre/wheel identification (lining)EBS23 Byte 3
      Tyre/wheel identification (temperature)EBS23 Byte 4
      Tyre pressure (actual tyre pressure)EBS23 Byte 5
      Brake liningEBS23 Byte 6
      Brake temperatureEBS23 Byte 7
      Brake cylinder pressure first axle left wheelEBS25 Byte 1
      Brake cylinder pressure first axle right wheelEBS25 Byte 2
      Brake cylinder pressure second axle left wheelEBS25 Byte 3
      Brake cylinder pressure second axle right wheelEBS25 Byte 4
      Brake cylinder pressure third axle left wheelEBS25 Byte 5
      Brake cylinder pressure third axle right wheelEBS25 Byte 6
      ROP (Roll Over Protection) system enabled/disabledEBS25 Byte 7, Bit 1-2
      YC (Yaw Control) system enabled/disabledEBS25 Byte 7, Bit 3-4
      Traction helpRGE21 Byte 1, Bit 5-6
      Lift axle 1 positionRGE21 Byte 2, Bit 1-2
      Lift axle 2 positionRGE21 Byte 2, Bit 3-4
      Steering axle lockingRGE21 Byte 2, Bit 5-6
      Tyre wheel identificationRGE23 Byte 1
      Tyre temperatureRGE23 Byte 2-3
      Air leakage detection (Tyre)RGE23 Byte 4-5
      Tyre pressure threshold detectionRGE23 Byte 6, Bit 1-3
  5. 2.5.

    The support of all other messages defined within ISO 11992-2:2003 including Amd.1:2007 is optional for the tractor and towed vehicle.