
4th edition, 9-11-2018
7000.05050, 4th edition, 9-11-2018
7000.05050
CANopen protocol description
27
3.8
NMT (Network Management)
The network management object governs the CiA 301 state machine of the CANopen
device and monitors the network nodes.
After switching on and initialising, the Motion Controller is automatically set to the
Pre-
Operational
state. In the
Pre-Operational
state the device can communicate only with NMT
messages and via SDOs.
Fig. 7:
CiA 301 state machine
Tab. 11: NMT changes of status
Status transition
CS
Meaning
Power on
–
The initialisation state is achieved automatically on switching on.
Initialisation finished
–
After initialisation the device is automatically in the Pre-Operational
state, and it sends a boot-up message.
Start remote node indication 0x01 (1d)
This starts the device and enables transmission of PDOs.
Enter Pre-operational state
indication
0x80 (128d) Stops the transmission of PDOs, SDOs are still active.
Stop remote node indication 0x02 (2d)
The drive is set to the stopped status, SDO and PDO are switched
off.
S
tart-Rem
ote-No
d
e-in
d
i
c
ation
S
top-Rem
ote-No
d
e-in
d
i
c
ation
Reset_No
d
e
In
d
i
c
ation
Reset_No
d
e
In
d
i
c
ation
Reset_No
d
e
In
d
i
c
ation
Reset_
C
ommuni
c
ation
in
d
i
c
ation
Reset_
C
ommuni
c
ation
in
d
i
c
ation
Reset_
C
ommuni
c
ation
in
d
i
c
ation
Initialization finishe
d
Ente
r P
RE-OPERA
TI
ON
A
L-
S
tate-in
d
i
c
at
io
n
S
top-Re
mote-No
d
e-in
d
i
c
ation
Enter PRE-OPERA
TIONAL-
S
tate-in
d
i
c
ation
S
tart-Remote-No
d
e-in
d
i
c
ation
Initialization
Pre-Operational
Power on
Power on or Har
d
ware Reset
Operational
S
toppe
d