RD4 CANopen®
7.2 NMT states
CANopen® devices are designed to operate using different states. Transition
from one state to another is achieved by sending specific NMT messages (see
Figure below).
(1) Power turned on
(2)
Initialization carried out, boot-up message is sent
automatically
(3) NMT message:
Start remote node
(4) NMT message:
Enter pre-operational
(5) NMT message:
Stop remote node
(6) NMT message:
Reset node
or
Reset communication
7.2.1 Initialization
This is the first state the CANopen® device enters after power is turned on or
after performing a hardware reset by means of a
Reset node
command. During
initialization, device reads and loads the parameters saved on EPROM. As soon
as the basic CANopen® device initialization is carried out, device sends a boot-
up message and then switches automatically to
Pre-operational
state.
MAN RD4 CB E 1.5
CANopen® interface
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Initialization
Pre-operational
Operational
Stopped
Boot-up message
(1)
(2)
(3)
(4)
(4)
(5)
(5)
(3)
(6)
(6)
(6)