Heinzmann Triton OMD, Manual

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3 HEINZMANN CAN protocol
6 Triton OMD CAN protocol / Rev.-No. 03
3.3 Telegram identifier
Basic structure of the 29-bit form of the identifier is as follows:
• mmmmm - are the five bits for the node number of the receiving device;
• nnnnn - is the node number of the sending device;
•
cccccccc - is the command code.
Communication
direction p d m r s n c Identifier
AC to AC 2 5 m 0 5 n c 10 0110 mmmmm 0 0110 nnnnn cccccccc
Tab. 3.2 Identifier template
3.4 Node numbers
For each device type in the HEINZMANN CAN network each node number in the range be-
tween 1 and 31 must be assigned only once.
Node number 0 is not allowed for a single device, since it is used as the number for messages
to all nodes of a certain type.
In OMD system the following node numbers are used:
• Evaluator has node number 31:
•
Sensors have node numbers from 1 to 16.
3.5 Baud rate
Baud rate is fixed and is equal to 250 kBaud.
3.6 Commands
The possible command codes of the telegrams and the respective data mapping are described
in the next section of this document.