Lenze 8400 - Network Management Telegram (NMT)

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 713
11 System bus "CAN on board"
11.7 Communication phases/network management
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
11.7.2 Network management telegram (NMT)
The telegram for the network management contains identifier "0" and the command included in
the user data which consists of the command byte and the node address:
[11-4] Network management telegram for changing over the communication phases
The communication phases are changed over by a node, the CAN master, for the entire network. The
CAN master can also be a inverter. Parameterising the inverter as CAN master
( 714)
Meaning of the node address in the user data:
• node ID = "0": The telegram addresses all nodes (broadcast telegram). The status of all nodes can
be changed at the same time.
• node ID = "1" ... "127": If a node address is specified, only the status of the node with the
corresponding address changes.
Example :
Data can only be exchanged via process data objects if the status is "Operational".If the CAN master
is supposed to switch all nodes connected to the bus from the "Pre-Operational" communication
status to the "Operational" communication status, the identifier and user data in the transmission
telegram must be set as follows:
• Identifier: 0x00 (network management)
• User data: 0x0100 ("Start remote node" NMT command to all nodes)
%LW %LW %LW %LW %LW %LW %LW %LW %LW
,GHQWLILHU 8VHUGDWD%\WH
&2%,' 
FRPPDQG
VSHFLILHU
FV
QRGH
DGGUHVV
QRGH,'
Command specifier (cs) NMT command
dec hex
1 0x01 Start remote node
20x02Stop remote node
128 0x80 Enter Pre-Operational
129 0x81 Reset node
130 0x82 Reset communication