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Operation
8.5 Communication via PROFIBUS DP
Bus terminating resistor and shielding
Reliable data transmission via PROFIBUS depends, amongst other things, on the setting of
the bus terminating resistors and the shielding of the PROFIBUS cables.
● Bus terminating resistor
The bus terminating resistors in the PROFIBUS plugs must be set as follows:
– First and last nodes in the line: Switch on terminating resistor
– Other nodes in the line: Switch off terminating resistor
● Shielding of the PROFIBUS cables
The cable shield must be connected in the plug through a large surface area at both
ends. See also Chapter PROFIBUS connection (Page 162).
8.5.3.3
Commissioning PROFIBUS
Preconditions and assumptions for commissioning
PROFIBUS slave
● The PROFIBUS address to be set for the application is known.
● The telegram type for each drive object is known by the application.
PROFIBUS master
● The communication properties of the SINAMICS DCP slave must be available in the
master (GSD file or Drive ES slave OM).
Commissioning steps (example with SIMATIC S7)
1. Set the PROFIBUS address on the slave.
2. Set the telegram type on the slave.
3. Perform the following in the HW Config:
– Connect the drive unit to PROFIBUS and assign the address.
– Set the telegram type.
4. Assign the I/O addresses according to the user program.
170
The same telegram type as on the slave should be set for every drive object
exchanging process data via PROFIBUS.
The device can send more process data than the slave uses. A telegram with a larger
PZD number than is assigned for the drive object in STARTER can be configured on
the device.
The PZDs not supplied by the drive object are filled with zeros.
The setting "without PZD" can be defined on a node or object (e.g. infeed controlled
via terminals).
Operating Instructions, 05/2016, A5E34382853K
SINAMICS DCP
- Quick Links:
- Block Diagram with Connection Suggestion
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