11.7
NMT Functions
The NMT (Network management) functions describe the NMT state machine and
NMT error control functions. The NMT state machine is controlled by NMT commands.
The error control functions guarding and heartbeat are set up by associated commu-
nication objects and controlled by special protocols.
The NMT-State is displayed via the actual value parameter
11.7.1
NMT state machine
A change of NMT-State may also be triggered by a communication (Bus-off, Guard-
ing, etc.). The behavior of the NMT state machine in such a case is described in
Chapter 12.2.17 "0x1029/n Error Behavior".
transition
(1)
(2)
(3)
(4), (7)
(5), (8)
(6)
(9), (10), (11)
(12), (13), (14)
In state transition (2) Initialisation Pre-Operational the device sends the Boot-Up
message.
04/13
At power on NMT state Initialisation is entered autonomously
NMT state Initialisation finished NMT state Pre-Operational en-
tered automatically, device sends Boot-Up message
Start Remote Node
Enter Pre-Operational
Stop Remote Node
Start Remote Node
Reset Node. Communication objects 0x1nnn and application ob-
jects 0x6nnn are reset.
Reset Communication. Communication objects 0x1nnn are reset.
CM-CAN ACU
Node-State
NMT command
1290.
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