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RD4 CANopen®
7.2.2 Pre-operational state
In this state communication between Master and Slave is possible using SDO
messages. They allow working parameters to be set. Slave cannot send PDO
messages.
To switch the Slave device to
Operational
state the Master must send a
Start
remote node
command using a NMT message.
7.2.3 Operational state
In this state the Slave device is active and all communication objects are
available. The Slave device can use the parameters available in the “Object
dictionary” and is allowed to send process data using PDO messages. “Object
dictionary” can be accessed using SDO messages. To switch the Slave device to
Pre-operational
state the Master must send an
Enter pre-operational
command using a NMT message.
WARNING
For safety reasons, in
Operational
state the Master must check the Slave device
continuously and in a proper way. For a description of the correct procedure see
section “7.6 PDO messages” on page 37.
7.2.4 Stopped state
In this state the Slave device is forced to interrupt communication with the
Master altogether (except node guarding, if active).
Communication using PDO and SDO messages is not allowed.
To switch the Slave device to
Pre-Operational
or
Operational
state the Master
must send the specific commands
Enter pre-operational
or
Start remote
node
using a NMT message.
MAN RD4 CB E 1.5
CANopen® interface
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