Operation
6.8 PROFINET IO
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
247
Replacing Control Unit CU320 (IO Device)
If the IP address and device name are stored in a non-volatile memory, this data is also
forwarded with the memory card (CF card) of the Control Unit.
If an IO device must be completely replaced due to a device or module defect, the Control
Unit automatically assigns parameters and configures the new device or module. Following
this, cyclic exchange of user data is restarted. The CF card allows module exchange without
an IO supervisor when a fault occurs in a PROFINET device.
Definition: Sub-network mask
The bits set in the sub-network define the part of the IP address that contains the address of
the (sub-) network. The following generally applies:
●
The network address is obtained by an AND operation on the IP address and sub-
network mask
●
The node address is obtained by an AND NOT operation on the IP address and sub-
network mask.
Example of the sub-network mask
Sub-network mask: 255.255.0.0 (decimal) = 11111111.11111111.00000000.00000000
(binary) IP address: 140.80.0.2 significance: The first 2 bytes of the IP address decide the
sub-network - in other words 140.80. The last two bytes address the node - in other words
0.2.
Default router
If data needs to be forwarded by means of TCP/IP to a partner located outside the sub-
network, this is carried out via the default router. In the properties dialog in STEP 7
(Properties of Ethernet interface > Parameters > Network transfer), the default router is
described as the router. STEP 7 assigns the local IP address to the default router.
6.8.2.4
Data transmission
Features
The Communication Board CBE20 supports:
●
IRT – isochronous real-time Ethernet
●
RT – real-time Ethernet
●
Standard Ethernet services (TCP/IP, LLDP, UDP and DCP)
