Hitachi WJ200 Series Quick Reference Manual page 29

8.2 Device Name (NameOfStation) and IP address
You need to set device name (NameOfStation) and IP address to WJ-PN with engineering tool.
Please refer to the manual of the engineering tool for the usage.
8.3 MAC address
WJ-PN has 3 MAC addresses of host, port1, and port2.
8.4 LLDP
LLDP (Link Layer Discovery Protocol) is a function to transmit own device information to the
neighbor devices at a fixed interval.
LLDP packet consists of multiple TLV (type-length-value). A TLV consists of 3 fields (type, length,
and value) and expresses a kind of information. In the case of following figure, length is n.
Type
7 bits
Please refer to the following subsection about the details of TLV of WJ -PN, and IEEE802.1AB-2009
about LLDP.
8.4.1 chassis ID
This data indicates the WJ-PN information.
Item
Type
Length
Value chassis ID subtype
chassis ID
MAC
port1
MAC address
Ethernet
Length
9 bits
Length
7 bits
9 bits
1 byte
n bytes
Chapter 8 PROFINET Specification
MAC Host
MAC address
MAC
port2
MAC address
Ethernet
Value
n bit
1
n+1
4 : MAC address of this port
7 : Device name (NameOfStation)
When the device name (NameOfStation) is set to
WJ-PN, this data is device name (NameOfStation).
When the device name (NameOfStation) isn't set
to WJ-PN, this data is MAC address of this port.
23
Value