Fieldbus Coupler 750-337, 750-338
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55
Fieldbus
Coupler
WAGO-I/O-SYSTEM 750
CANopen
cation object consists of a CAN telegram, which contains maximally 8 byte
utilizable data and it is assigned a unique COB-ID (Communication Object
Identifier) in the network.
Parameters for the communication objects as well as parameters and data of
the CANopen subscribers are filled in an object directory().
3.1.5.1 Communication objects
The fieldbus coupler 750-337 and 750-338 support the following communica-
tion objects:
•
32 Tx-PDOs,
for process data exchange of fieldbus node input data
•
32 Rx-PDOs,
for process data exchange of fieldbus node output data
•
2 Server SDO,
for exchange of configuration data and for information on the state of the
node
•
Synchronization Object (SYNC),
for network synchronisation
•
Emergency Object (EMCY)
•
Network Management Objects
- Module Control Protocols
- Error Control Protocols
- Bootup Protocol
3.1.5.2 Communication interfaces
For a data exchange, the CANopen fieldbus coupler is equipped with two inter-
faces:
•
the interface to fieldbus (-master) and
•
the interface to the bus modules.
Data exchange takes place between the fieldbus master and the bus modules.
Access from the fieldbus side is fieldbus specific.
3.1.5.3 Memory Areas
The coupler uses a memory space of 256 words (word 0 ... 255) for the physi-
cal input and output data.
