AVT110 Tachograph Manual

The FMS connector connects to CAN1 of the AVT110. FMS connector shape and pinout vary between truck makes and models — see the full PDF for an illustrative diagram. For CAN1 connection position, refer to the installation manual for the particular truck model. Installation diagram requests: support@iot-at.com

Connect the tachograph to CAN2, K-Line, and GND while the vehicle CAN-BUS connects to CAN1. If only the tachograph is connected, use CAN2, K-Line, GND, and run auto-synchronization.

• In CANbus & Tacho → CANbus settings, configure AT@CAN command Enable <mode> to 2 or 3.
• Very important: measure resistance on tachograph connector C pins 5/7 when CAN2 wires are connected and the tachograph is OFF. If it reads 120 Ω, configure the 120 Ω resistor in CANbus & Tacho → CANbus → AT@CAN. Final resistance on these pins should be 60 Ω.
• Configure AT@CAN to enable CAN2 L and CAN2 H parallel 120 Ω resistor (mask in <CAN 120 ohms Mask>). For some truck brands like Scania, only CAN1 may be used for the DDD download process.
• Enable <Tachograph Info Mask> — includes tachograph information, overspeed signal, vehicle motion signal, driving direction, driver 1/2 card numbers, driver 1/2 names, and real-time clock date/time.

CANbus codes auto-synchronization lets the AVT110 detect the connected vehicle model. Switch ignition on and send AT@RTO=at,14,2,,,,,FFFF# after installation. Observe the CAN LED during synchronization. For synchronized ID details, refer to AT@RTO=at,14,0,,0001# (sub-command 14 in RTO — Real Time Operation).

• Use the AT@TAC command to start DDD file download.
• DDD files can upload via +LDP messages to the server or FTP server, configured by <Report Mode> of AT@TAC.
• DDD files can be read from tachograph memory, Driver 1 card, and Driver 2 card — set via <Read File Type> of AT@TAC.
• <Start time> and <End time> are valid when <Read File Type> is set to 1 (request to read tachograph memory).