Lenze 931W - Manual (Page 36)

Control word / status word
The Profidrive state machine
Example: State machine for speed operation
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36 K-HB 13.0001-EN 2.1
6.4.2 Example: State machine for speed operation
In this example, the drive is to be commissioned with the predefined driving record no. 1
(n = 2400 1/min; M = 1320 mNm) with speed control.
The selected PPO type 3 permits the writing and reading of the control word / status word
and the selection of the pre-programmed driving records. The selected PPO type
determines the input and output addresses of the registers to be described (”buffer”)inthe
frequency inverter. It is mandatory for the state transitions to write the control words
stepwise; the following table displays the bit patterns for a better understanding:
Status High byte STEW (1. address) Low byte STEW (2. address)
s1 0000 0100 0011 0110
S2 0000 0100 0011 0111
S3 0000 0100 0111 1111
S4 0000 0100 1011 1111
S5 0000 0100 1011 1110
Tab. 14 Control word state transitions - speed example
As aforementioned, it is possible to open a PROFIBUS monitor via the ”Display fieldbus”
field in the ”Service” tab of the operating program. The following screenshots illustrate the
single steps of the state machine by means of the PROFIBUS monitor:
Status S1: Switch-on inhibit Status S2: Ready to switch on
931mPro_010 931mPro_011