Type of bus system to which a bus port is assigned as a bus node. The following values are possible:
0 = Other bus systems
1 = CANbus
2 = DeviceNet
3 = EtherCAT
4 = Ethernet
5 = Foundation Fieldbus
6 = Interbus
7 = Lightbus
8 = Local-bus: Rack / PLC card
9 = ModBus
10 = MPI bus
11 = PROFIBUS
12 = PROFINET
13 = ASI
14 = Local-bus: Extension
15 = X2X
16 = Powerlink
17 = CC-Link
18 = ControlNet
19 = DALI
20 = EIB
21 = EtherNet/IP
22 = FIPIO
23 = LON
24 = RS232/RS485
25 = SERCOS interface
26 = USB
27 = IPLink
28 = Axioline
29 = DIOBus
30 = RIOBus
31 = ERIOBus
32 = RIO/DIO bus
33 = MDI I/O bus
34 = VARAN
35 = CC-Link IE
36 = Modbus TCP
37 = SERCOS III
38 = DRIVE-CLiQ
39 = SSCNET III
40 = CC-Link IE Control
41 = CC-Link IE Field
42 = IO-Link
43 = SSI
44 = ET-Connection
45 = CC-Link IE Field Basic
46 =PortToPort
