96 • CANopen
Network
Communication
WAGO-I/O-SYSTEM
750
CANopen
4.3.2.3 PRE-OPERATIONAL
In this status, communication can be made via SDOs. Communication via
PDOs is not possible. The SDOs allow for reading and writing in the entries of
the object directories permitting for instance to re-configure the bus coupler
by means of the configuration tool. Mapping, bus coupler parameters, IDs etc.
can in this manner be adapted to the required conditions. The newly config-
ured configuration can be saved in flash.
A change from the pre-operational status to the operational status is performed
by means of the NMT service Start_Remote_Node.
In the pre-operational status the I/O LED is lit green and the RUN LED
blinks.
4.3.2.4 OPERATIONAL
This status allows communication via SDOs and PDOs, it does, however, not
allow different configurations. It is, for instance, not allowed to change the
COB ID in the presence of a valid PDO. For a detailed description, please re-
fer to the corresponding entries in the object directory.
The change from the operational status to the pre-operational status is per-
formed with the NMT service Enter_Pre_Operational_State.
In the operational status, the I/O and the RUN LED are lit.
4.3.2.5 STOPPED
The Stopped status reflects an error status. This is the case if the NMT service
Stop_Remote_Node was received or if a fatal internal error has occurred (i.e.
module was removed during operation).
This status does not allow communication via SDOs or PDOs. Only the NMT
services and the Node Guarding/Heartbeat (if activated) are performed.
You can quit the Stopped status via the NMT services
Start_Remote_Node_Indication, Enter_Pre_Operational_State and Re-
set_Node.
The Stop LED is lit in the Stopped status.