Vacon optea Installation Manual page 156

vacon • 156
Instance Attribute "Encapsulation Inactivity Timeout"
The Encapsulation Inactivity Timeout attribute is used to enable the TCP socket cleanup (closing)
when the defined number of seconds have elapsed with no Encapsulation activity. The default value
is 120 seconds. The TCP keep-alive traffic does not count as Encapsulation activity.
Instance Attribute "Select ACD"
This attribute is used to enable or disable ACD (Address Conflict Detection) functionality.
For more information see Chapter 4.5 "ACD (Address Conflict Detection)".
Instance Attribute "Last Conflict Detected"
This attribute contains information of the last IP address conflict. The content of this attribute can
be resetted by writing zero to this attribute.
The struct member "ACD Activity" tells the state of ACD algorithm when the last conflict was
detected. Possible values are defined in the following table.
Value
0
1
2
3
The struct member "Remote MAC" tells the MAC address the source of the last IP address conflict.
The struct member "ARP PDU" contains the ARP message (raw copy) received from the source of
the IP address conflict. Content of the ARP message is described in the following table.
9
Value
0
1-3600
Table 122. ACD Activity values
ACD Mode
No conflict detected
(default)
Probe IPV4 address
Ongoing detection
Semi active probe
Table 123. The ARP PDU in binary format
Field size (bytes)
2
2
1
1
2
6
4
6
4
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Table 121.
Description
Disable
Timeout in seconds
Description
No conflict has been detected since this attribute was
last cleared.
Last conflict detected during IPV4 address probe state
Last conflict detected during OngoingDetection-state
or subsequent DefendWithPolicyB state
Last conflict detected furint SemiActiveProbe-state or
subsequent DefendWithPolicyB-state
Field Description
Hardware type (1 for Ethernet HW)
Protocol type (0x800 for IP)
Hardware size (6 for Ethernet HW)
Protocol size (4 for IP)
Operation code (1 for request or 2 for
response)
Sender MAC address
Sender IP address
Target MAC address
Target IP address
EtherNet/IP