BUDE_Manual-CANopen_EN.doc
15/55
Baumer Hübner GmbH
23.10.2012/bja
Berlin, Germany
3.3.6
Network management services
Network management can be divided into two groups.
Using the NMT services for
device monitoring
, bus users can be initialized, started and stopped.
In addition, NMT services exist for
connection monitoring
.
Description of the NMT command
The commands are transmitted as unconfirmed objects and are structured as follows:
Byte 0
Byte 1
Byte 2
COB ID = 0
Command byte
Node number
The
COB ID
for NMT commands is always zero. The node ID is transmitted in byte 2 of the NMT command.
Command byte
Command byte
Description
In state event drawing
01h
Start remote node
1
02h
Stop remote node
2
80h
Enter pre-operational mode
3
81h, 82h
Reset remote node
4, 5
The
node number
corresponds to the node ID of the required users. With node number = 0, all users are
addressed.
NMT state event
Following initialization, the encoder is in the pre-operational mode. In this status, SDO parameters can be
read and written. In order to request PDO parameters, the encoder must first be moved to the operational
mode status.
Init
Pre-Operational
Operational
Stopped/Prepared
Power on oder Hardware Reset
1
3
2
1
3
2
4/5
BootUp Message
4/5
4/5