Lenze 931W - Manual (Page 28)

Control word / status word
Control word
6
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28 K-HB 13.0001-EN 2.1
6.2 Control word
The meaning of the single bits of the control word partly depends on the control selected.
Two control types, speed and positioning control, are available (concerning this see the
parameter PNU 930). Inthe Tab. 7 those bits ofthe controlword areexplained themeaning
of which are firmly defined irrespective of the controller type. The Tab. 8 and Tab. 9
describe the bits with a controller type-specific meaning. The Tab. 8 contains a detailed
description of the bits for a speed-controlled system and the Tab. 9 describes a
position-controlled system.
To address the inverter via the PROFIBUS master, first the control authority must be
requested by setting the bit 10 in the control word. Without the control authority the drive
cannot be accessed. The control authority enables the user to e.g. to start and stop a drive
via the control word or the state machine. ( 33). The user cannot change parameters
with the control authority (e.g. driving records or control parameters). For this purpose, the
parameter change rights must be requested, see PNU 927 ( 52). The following chapters
describe in detail the connection between the control authority and the parameter change
rights.