Siemens SINAMICS G120 - STEP 7 Program Examples; Data Exchange Via the Fieldbus - CU230

Appendix
A.7 Application examples
Inverter with CU230P-2 Control Units
438 Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
A.7.3
STEP 7 program examples
A.7.3.1
Data exchange via the fieldbus - CU230
Data exchange via the fieldbus
Analog signals
The inverter always scales signals that are transferred via the fieldbus to a value of 4000
hex.
Table A- 10 Signal category and the associated scaling parameters
Signal category
4000 hex ≙ …
Signal category
4000 hex ≙ …
Speeds, frequencies
p2000
Power
p2004
Voltage
p2001
Angle
p2005
Current
p2002
Temperature
p2006
Torque
p2003
Control and status words
Control and status words consist of a high byte and a low byte. A SIMATIC control interprets
words differently than the inverter: The higher and lower-order bytes are interchanged when
they are transferred. See also the following program example.