Fieldbus Coupler 750-337, 750-338
•
61
Fieldbus
Coupler
WAGO-I/O-SYSTEM 750
CANopen
3.1.6.4 Changing to the OPERATIONAL Status
You can change the coupler PRE-OPERATIONAL status to the
OPERATIONAL status using the
Start_Remote_Node
command from the
network management objects. This creates the communication readiness of the
fieldbus node for PDOs (see chapter 5.3.3.1.1 "Start Remote Node").
Note
As a default setting, the PDO transmission of the analog input data is
switched off. For this reason, this data is read out only once and subse-
quently never updated. To be able to use this data via the PDOs, switch the
analog input data on in the PRE-OPERATIONAL status. Access via the
SDOs is possible at any time.
If no further settings are made, the coupler is operational. Communication is
possible according to the Default-Mapping (refer to chapter 5.3.4.1 "Initializa-
tion").
3.1.6.5 Switching on the analog Input Data
To avoid the CAN bus from overflowing with CAN messages, the transmis-
sion of analog input data via PDOs is deactivated in the default setting. This
means that object 0x6423 "Analoge Input Global Interrupt Enable" has the de-
fault value 'FALSE' (= '0') (refer to chapter 5.3.4.4.12 "Objekt 0x6423, Ana-
logue Input Global Interrupt Enable").
When the coupler has the PRE-OPERATIONAL status, you can generally re-
lease the transmission by setting the object 0x6423 to the TRUE (= '1') value.
Subsequently, the "
Start Remote Node
" command can be used to change the
coupler status from PRE-OPERATIONAL to OPERATIONAL. This process
allows communication via PDOs and the transmission of analog input data.
If no further settings are made, the coupler is operational and communication
can occur according to the Default Mapping (refer to chapter 5.3.4.1 "Initiali-
zation").
