Network Classes; Fig. 6 Network Classes; Fig. 7 Dip Switch - Beckhoff BK9105 Documentation

Parametrization and commissioning
DIP switch Parameters
1 Baud Rate
2 Auto-Baud-Rate
3 Transmission type
• To accept the values, set DIP switch 10 to ON.
By flashing the I/O RUN and I/O ERR LEDs the Bus Coupler indicates that it has accepted the
parameters.
• You can then switch the Bus Coupler off, connect the Bus Terminals, and continue as usual.
4.3

Network classes

Three different network classes are distinguished. They determine how many address bits are reserved for
the network ID and how many for the node number (e.g. for PCs or Bus Couplers). The difference is located
in the first three bits of the IP address.
Network Number of bits for
class the network ID
A 7
B 14
C 21
Unique IP address
An IP address must be unique within the entire connected network!
Fig. 6: Network classes
Identical network class
In a communication with another Ethernet devices, the IP address set must have the same network
class. Sample: Your PC has the address 172.16.17.55, which means the coupler must have the ad-
dress 172.16.xxx.xxx (xxx stands for a number between 0 and 255. 0 is usually used by the router/
switch and should therefore remain reserved).
In order to see the PC's own address, the command ipconfig can be entered into a DOS window under
Windows NT/2000/XP.
22
Selection
10 MBaud
100 MBaud
Disable
Enable
Half duplex
Full duplex
Enables no. of No. of bits for the
networks node address
126 24
16 382 16
2 097 150 8
Version: 2.0.0
Setting Comment
OFF (0)
ON (1) Default
OFF (0)
ON (1) Default
OFF (0)
ON (1) Default
Enables no. of nodes per
network
16 777 214
65 536
254
BK9055 and BK9105