
7
Project planning and startup with MOVITOOLS
®
MotionStudio
Startup of the fieldbus at the DHR21B/41B controller
Manual – DHE/DHF/DHR21B (standard) and DHE/DHF/DHR41B (advanced)
57
If you compare the IP addresses with the subnet masks, you see that in the binary
representation of the subnet mask all ones determine the network address and all the
zeros determine the station address (see following table).
Byte 1
Byte 2
Byte 3
Byte 4
IP address
decimal
192
. 168
. 10
. 129
binary
11000000
. 10101000
. 00001010
. 10000001
Subnet mask
decimal
255
. 255
. 255
. 128
binary
11111111
. 11111111
. 11111111
. 10000000
The class C network with the address 192.168.10. is further subdivided by the subnet
mask 255.255.255.128. 2 networks are created with the address 192.168.10.0 and
192.168.10.128.
The following node addresses are permitted in the two networks:
•
192.168.10.1 ... 192.168.10.126
•
192.168.10.129 ... 192.168.10.254
The network nodes use a logical AND operation for the IP address and the subnet
mask to determine whether a communication partner is present in the same network
or in a different network. If the communication partner is in a different network, the
standard gateway is addressed for passing on the data.
Standard gateway
The standard gateway is also addressed via a 32-bit address. The 32-bit address is
represented by 4 decimal numbers separated by decimal points.
Example: 192.168.10.1
The standard gateway establishes a connection to other networks. In this way, a net-
work node that wants to address another node can use a logical AND operation with
the IP address and the subnet mask to determine whether the required node is loc-
ated in the same network. If this is not the case, the node addresses the standard
gateway (router), which must be part of the actual network. The standard gateway
then takes on the job of transmitting the data packages.
DHCP (Dynamic Host Configuration Protocol)
Instead of setting the 3 parameters IP address, subnet mask and standard gateway
manually, they can be assigned automatically by a DHCP server in the Ethernet net-
work.
This means the IP address is assigned from a table, which contains the allocation of
MAC address to IP address.
Parameter P785 indicates whether the DHR21B/41B option expects the IP parameters
to be assigned manually or via DHCP.
22900055/EN – 08/2016
Содержание DH 21B Series
Страница 2: ...SEW EURODRIVE Driving the world ...
Страница 88: ......
Страница 89: ......
Страница 90: ......
Страница 91: ......