Communication; Can-Bus; Redundant Can-Bus; Can-Bus Driveline - Kalmar DRF420-60S5 Maintenance Manual

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2. CAN-bus drivetrain

Principle illustration redundant CAN-bus

Principle illustration CAN-bus drivetrain

11 Common electrics – 11.6 Communication

Communication, general

The machine's communication is handled by a so-called CAN-bus

system. The CAN-bus system consists of control units connected to

form a network.

The idea with a network is to share information. Signal values are

sent out by the control unit that, e.g., is connected to a sensor, other

controls units can use the signal for their functions.

The network consists of control units and segments. Segment is the

CAN-bus between the control units.

CAN bus, description

The CAN bus consists of two twisted paired leads (twisted pair).

Redundant CAN-bus, description

Redundant CAN-bus means that every control unit has two connec-

tions for communication. The CAN-bus is connected in series be-

tween the control units. This means that the CAN-bus can handle

loss of a segment. If several segments are lost, some control unit(s)

lose contact with the network and work independently, often with

limited capacity to perform its task.

The signals can be checked with diagnostic menu.

CAN-bus drivetrain, description

Communication with Control unit engine (D794) and Control unit

transmission (D793) is separated from the redundant CAN-bus.

The signals can be checked with diagnostic menu.

Maintenance manual DRF 400–450

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Communication

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