New properties/functions
3.2 Changes compared to the previous version
SIMATIC PN/CAN LINK
14
Operating Instructions, 03/2022, A5E39895388-AC
New parameters
Under "CANopen Manager > Communication"
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Max. SDO timeout
Some "simple slave" devices are slow to respond to commands of the CANopen Manager.
Such devices work on other, more important tasks and CANopen communication has low
priority. The reaction to the command from the manager is therefore delayed. In this case,
the manager waits for the "max SDO timeout" (ms). The SDO- request is aborted when the
preset time has elapsed. There is also a 1 second delay before a new request is sent.
The SDO Timeout is only displayed to the user when an SDO with the data record number
0x200 - 0x20F is requested. The timeout is displayed instead of the 4-byte code "Additional
error information code" as 0x05040000 (code number taken from CiA standard "CiA 301").
This code occupies the 6th to 9th byte of the data record read.
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Max. BootUp timeout
The max. bootup timeout gives the maximum response time in seconds for the startup
process of a node. When a node does not respond to the requests of the manager within the
specified time, the diagnostic message "BootUp, node not responding" is sent to the PLC. The
diagnostic message is deleted as soon as the node responds correctly to the manager.
Under "CANopen Manager > Diagnostics"
For PN/CAN LINK V2.0, the menu "CANopen Manager > Response to EMCY message" is
changed to "CANopen Manager > Diagnostics" .
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Check box Response to EMCY message: Pass event as diagnostics to S7
This option has merely been renamed.
When you select this option, all received EMCY messages are sent to the IO controller as
diagnostic alarms.
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Check box Enable diagnostic alarms for not mandatory nodes
The option applies only to nodes that are not mandatory.
When you disable this option, the disconnection of the nodes from the CAN bus or error
messages that are pending in the CANopen network are not sent to the diagnostic buffer and
the ERROR LED remains off.
When you select this option, error messages from such nodes are displayed in the diagnostic
buffer and the ERROR LED lights up.
All other nodes on the CAN bus are not affected by this option.
•
Check box Enable additional diagnostics alarms
When you disable this option, the device does not send diagnostic alarms related to the
operating mode (CANopen Manager, CANopen Slave and CAN transparent). Both error LEDs
remain off.
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