Functions
5.11 Operation in fieldbus systems
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
161
Permissible cable length / installing and shielding the PROFIBUS cable
For information about this, see
http://support.automation.siemens.com/WW/view/de/1971286.
5.11.2.2 Example: configuring the frequency converter on PROFIBUS
Task
A drive with a SINAMICS G120 frequency converter is to be controlled from a central
SIMATIC controller via PROFIBUS, whereby the control signals and speed setpoint are to be
transferred from an S7-300 CPU to the drive. In the other direction, the drive is to transfer its
status messages and actual speed value to the central controller via PROFIBUS.
Using a suitable example, the following section provides step-by-step instructions explaining
how to connect a frequency converter to a higher-level SIMATIC controller via PROFIBUS.
To extend the PROFIBUS network to include additional frequency converters, simply repeat
the relevant steps.
What prior knowledge is required?
This section does not explain how to use S7 controllers or the STEP 7 engineering tool.
Hardware components (example)
Component Type Order no. Qty
Central controller
Power supply PS307 2 A 6ES7307-1BA00-0AA0 1
S7 CPU CPU 315-2DP 6ES7315-2AG10-0AB0 1
Memory card MMC 2MB 6ES7953-8LL11-0AA0 1
DIN rail DIN rail 6ES7390-1AE80-0AA0 1
PROFIBUS connector PROFIBUS connector 6ES7972-0BB50-0XA0 1
PROFIBUS cable PROFIBUS cable 6XV1830-3BH10 1
Drive
SINAMICS G120 Control
Unit
CU240S DP 6SL3244-0BA21-1PA0 1
SINAMICS G120 Power
Module
PM240 6SL3224-0BE21-5UA0 1
Basic Operator Panel BOP 6SL3255-0AA00-4BA1 1
Motor Three-phase induction
motor
1LA7060-4AB10 1
PROFIBUS connector PROFIBUS connector 6GK1500-0FC00 1
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