Data Transmission - Siemens SINAMICS DCM Operating Instructions Manual

Descriptions of functions
10.3 PROFINET IO
Subnet screen example
Subnet screen: 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 determine the
subnetwork; i.e. 140.80. The last two bytes address the node; i.e. 0.2.
Default router
If data needs to be forwarded via TCP/IP to a partner located outside the subnetwork, 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 referred to as the router.
STEP 7 assigns the local IP address to the default router.
10.3.2.4

Data transmission

Properties
The Communication Board CBE20 supports the simultaneous operation of:
● IRT – isochronous real-time Ethernet
● RT – real-time Ethernet
● Standard Ethernet services (TCP/IP, LLDP, UDP, and DCP)
PROFIdrive telegram for cyclic data transmission and non-cyclic services
Telegrams to send and receive process data are available for each drive object of a drive
unit with cyclic process data exchange. In addition to cyclic data transfer, acyclic services
can also be used for parameterizing and configuring the drive unit. These acyclic services
can be utilized by the IO supervisor or IO controller.
The total length of the Ethernet frame increases with the number of drive objects in a drive
unit.
Sequence of drive objects during data transmission
The sequence of drive objects is displayed via a list in p0978[0...15]; it can also be changed
using this parameter.
Note
The sequence of drive objects in HW Config must be the same as that in the drive (p0978).
NOTICE
A ring-type topology is not permissible.
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Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
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