Functions
5.1 CANopen
SIMATIC PN/CAN LINK
36
Operating Instructions, 03/2022, A5E39895388-AC
5.1.1.4
Service Data Objects (SDO)
The PN/CAN LINK enables read/write access from the S7 user program to the OD of other
CANopen nodes by means of SDO.
The PN/CAN LINK provides 16 data records on the PROFINET side of the PN/CAN LINK which
the S7 user program can access with the help of the acyclic PROFINET IO services RDREC
(Read data record) and WRREC (Write data record).
Note
This functionality is only available in the "CANopen Manager" operating mode.
Detailed information is available in the section Acyclic data exchange between controller and
PN/CAN LINK (Page 49).
5.1.1.5
EMCY messages
EMCY messages
The PN/CAN LINK transmits the following EMCY messages:
Error code
Meaning
0x8Fxx
Heartbeat or node guarding error for node <xx>
Is transmitted when the PN/CAN LINK is in "CANopen Slave" operating mode
and the heartbeat for a monitored node fails.
0x8130
General heartbeat or node guarding error. Is transmitted when the PN/CAN
LINK is in "CANopen Slave" operating mode, node guarding is enabled and
monitoring by the master fails.
0xFF90
Is transmitted when the connection to the S7 controller fails, that is when
the connection (Application Relation) is terminated or when the data from
the S7 controller has the IO provider status "Bad".
When the PN/CAN LINK is operated as "CANopen Slave", this EMCY message
is transmitted again when the NMT Manager tries to set the PN/CAN LINK to
the "Operational" state.
0xFF91
Is transmitted when the PN/CAN LINK is operated as "CANopen Slave" and
the desired state transmitted by the S7 controller in the cyclic data changes
to "OFF".
Is also transmitted when the NMT Manager tries to set the PN/CAN LINK to
"Operational" state while the desired state transmitted in the cyclic data
from the S7 controller is still "OFF".
The EMCY messages always use the default COB ID intended for this purpose.
Summary of Contents for SIMATIC PN/CAN LINK
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