Configuring The Fieldbus - Siemens SINAMICS G120 CU230P-2 HVAC Operating Instructions Manual

Configuring the fieldbus

Before you connect the inverter to the field bus, you should have completed the basic
commissioning, see Chapter Commissioning (Page 53)
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
PROFIBUS DP
(Page 98)
USS (Page 119)
Modbus RTU
(Page 133)
BACnet MS/TP
(Page 143)
CANopen
(Page 152)
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
Speeds, frequencies
Voltage
Current
Torque
Power
Angle
Temperature
Acceleration
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
example for cyclic communication (Page 328).
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Profile Control Unit
PROFIdrive CU230P-2 DP
PROFIsafe
- CU230P-2 HVAC
- CU230P-2 HVAC
- CU230P-2 HVAC
- CU230P-2 CAN
4000 hex corresponds to the value of the following parameters
p2000
p2001
p2002
p2003
p2004
p2005
p2006
p2007
Interface
SUB D socket
RS485 connector
RS485 connector
RS485 connector
SUB-D connector
6
97