Heinzmann Triton OMD, Manual

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3 HEINZMANN CAN protocol
Triton OMD CAN protocol / Rev.-No. 03 7
3.7 OMD network communication basics
Communication network topology is shown on the picture below:
Fig. 3.1 Communication network topology
Communication between master device (evaluator or superordinate system) and HEINZ-
MANN OMD sensors is organized in the following way:
• Only the first sensor - sensor 1 and the last sensor - sensor N (N – actual number of sen-
sors in the network) in the network are connected to master device directly (via CAN1
and CAN2 respectively). Other sensors establish direct communication to the master
over partner-devices on both sides via CAN1 and CAN2.
• Communication is point-to-point and is handled as a tunneling connection.
• If destination node number data item of the incoming telegram identifier (mmmmm) is
not equal to current receiver node number (ID), then the message is retransmitted to the
next node in the network until it reaches the receiver specified with (mmmmm). Other-
wise, the message is processed and corresponding response is transmitted to the produc-
er or other predefined actions are performed by the receiver device.
Fig. 3.2 Tunneling connection