Siemens SINAMICS G120 Instructions d'exploitation Page 103

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Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB
101
Configuring the fieldbus
6
Before you connect the inverter to the field bus, you should have completed the basic
commissioning, see Chapter Commissioning (Page 55)
Fieldbus interfaces of the Control Units
The Control Units are available in different versions for communication with higher-level
controls with the subsequently listed fieldbus interfaces:
Fieldbus Profile Control Unit Interface
PROFIdrive PROFIBUS DP (Page 102)
PROFIsafe
CU240B-2 DP
CU240E-2 DP
CU240E-2 DP-F
Sub D socket
USS (Page 123) -
Modbus RTU (Page 137) -
CU240B-2
CU240E-2
CU240E-2 F
RS485 connector
Data exchange via the fieldbus
Analog signals
The converter always scales signals, which are transferred via the fieldbus, to a value of
4000 hex. The significance of this numerical value depends on the category of the signal that
you are transferring.
Signal category 4000 hex corresponds to the value of the following parameters
Speeds, frequencies p2000
Voltage p2001
Current p2002
Torque p2003
Power p2004
Angle p2005
Temperature p2006
Acceleration p2007
Control and status words
Control and status words always comprise two bytes. Depending on the control type, the two
bytes are differently interpreted as higher or lower significance. An example for transferring
control and status words with a SIMATIC control is provided in Chapter STEP 7 program
exam
ple for cyclic communication (Page 284).
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