BT RRE200 - MCU - Main Control Unit; General; System Communication; ACT;ACH Transistor Regulators

4 – 44 Repair Manual RRE140/160/180/200/250 © BT
Functions and parameters
Functions
T-code Valid from serial number Date Publication No.
815, 816 6051502 2008-08-21 261828-040
4.8.2 MCU – Main Control Unit
General
The MCU is the main processor in the truck and communicates with the
traction transistor regulator, the lift transistor regulator, the steering ser
-
vo and the displays via two CAN networks. The truck parameter and
error code settings are also stored in the MCU. A back-up copy of the
parameters is also saved in the CID.
The MCU monitors and regulates the truck functions relating to steer-
ing, driving, braking, hydraulics, communication and various other
things.
The TruckCom service program must be used for downloading new
software.
System communication
The MCU is connected to both CAN1 and CAN2 and acts as a hub for
CAN communication between the various processors in the truck.
CAN1 is used for communication between the MCU and the various
displays (CID and LID). CAN2 is used for communication between the
MCU, the steering servo (EPS), and the transistor regulators (ACT and
ACH).
4.8.3 ACT/ACH transistor regulators