System overview
4.1 Field of application
SIMATIC PN/CAN LINK
28 Operating Instructions, 03/2022, A5E39895388-AC
CANopen Manager
• CANopen implementation according to CANopen specification "CiA 301"
• The PN/CAN LINK can operate up to 126 slaves as CANopen Manager in the CANopen
network.
• Network management functions according to CiA standard "CiA 302 Part 2".
If the PN/CAN LINK is operated as CANopen Manager, it takes over the following functions:
– NMT Master: The PN/CAN LINK controls the NMT state of the other CAN devices and
executes the boot-up procedure according to the CiA standard "CiA 302 Part 2".
– Configuration Manager: The PN/CAN LINK configures the CANopen slaves during the
boot-up procedure by means of SDO write access.
– The PN/CAN LINK also supports the following CANopen standards:
CiA 303 Part 1 - Cabling and pin assignment V1.8.0
CiA 303 Part 3 - LED control - Display specification, V1.4.0
CiA 309 Part 4 - Mapping of data types and their conversion (Amendment 7 to Fieldbus
Integration into PROFINET IO, V1.0.0)
– The PN/CAN LINK does not support the following standards:
CiA 305 - regarding LSS functionality
CiA 306 - regarding XDD files
CiA 1301+CiA 601 - regarding CANopen FD (Flexible Data)
• I/O data are transmitted on the CANopen side with the help of process data objects
(PDOs).
• All PDO transmission rates specified in the CiA301 standard are supported.
• Segmented SDO data transmission is supported.
• SYNC function as producer (sender) as well as consumer (receiver)
• "Heartbeat" function as producer (transmitter) as well as consumer (receiver)
• "Node Guarding" function as producer (transmitter) as well as consumer (receiver)
• "EMCY" (Emergency) function
CANopen Slave
• The PN/CAN LINK can be used as an "NMT slave" according to "CiA 302 Part 2".
When the PN/CAN LINK is an NMT slave, another CANopen Manager configures the OD
and thus which data is exchanged with which other devices.
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