Siemens SINAMICS G120D - Communication via PROFIBUS

Configuring the fieldbus
7.3 Communication via PROFIBUS
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
91
7.3
Communication via PROFIBUS
7.3.1
What do you need for communication via PROFIBUS?
Check the communication settings using the following table. If you answer "Yes" to the
questions, you have correctly set the communication settings and can control the converter
via the fieldbus.
Questions
Description
Examples
Is the inverter correctly
connected to the PROFIBUS?
See Section: Connections and cables
(Page 36).
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Have you configured the
communication between the
inverter and the higher-level
controller?
See Section: Configuring the
communication using SIMATIC S7
control (Page 92)
See Manuals for your
inverter (Page 371)
Do the addresses in the inverter
and the higher-level controller
match?
See Section: Setting the address
(Page 92).
Is the same telegram set in the
higher-
level controller and in the
inverter?
Adapt the telegram in the inverter. See
Section: Select telegram (Page 93).
Are the signals that the inverter
and the controller exchange via
PROFIBUS correctly
interconnected?
Adapt the interconnection of the signals
in the controller to the inverter. For the
PROFIdrive-compliant interconnection in
the inverter, see also Section:
PROFIdrive profile for PROFIBUS and
PROFINET (Page 94).
7.3.2
Integrating the inverter in PROFIBUS
Procedure
To connect the inverter to a control via PROFIBUS, proceed as follows:
1. Integrate the inverter in the bus system (e.g. line topology) of the control using
PROFIBUS cables and the two PROFIBUS jacks X03 and X04. If your inverter forms the
end of the line, only use jack X03 and connect the bus-terminating resistor.
The position of the jacks and the pin assignment can be found in Section Overview of the
interfaces (Page 35).
The maximum permitted cable length to the previous station and the subsequent one is
100 m at a baud rate of 1 Mbit/s.
2. Externally supply the inverter with 24 V DC through X01.
The external 24 V supply is only required if communications with the control should also
run when the mains voltage is switched off.
You have now connected the inverter to the control using PROFIBUS DP.