Beckhoff CU2508 Documentation page 62

Commissioning
Advanced Settings:
• "ARP Retry Interval": In order to ascertain the presence of the recipient, the publisher sends an ARP
request to the target device at these intervals. If the network administration of the recipient is
operational, it sends an ARP reply. This is only meaningful with unicast.
In the event of an error bit 3 is set (0x0004) in the diagnostic FrameState variable.
Note: ARP handling (ARP = Address Resolution Protocol: allocation of hardware/MAC addresses to
network addresses [IP]) is managed by the operating system (Windows).
• "Disable Subscriber Monitoring": Deactivates the procedure described above
• "Target Address changeable": In this case the destination IP can be changed dynamically
Publisher, Variable
Fig. 83: Publisher variable settings
Settings:
• "Variable ID": Identification number with which the variable is sent. Can be changed online via PLC
where appropriate
• "Data exchange": see above (not for EL66xx)
• "On change only": NWV is only sent if the value changes (not for EL66xx)
62 Version: 2.6 Real-time Ethernet port multiplier