PROFINET IO – Communication profiles 307
PROFIdrive communication profile
Control word and Status word
The Control word (PROFIdrive parameter 967) is the principal
means for controlling the drive from a fieldbus system. It is sent by
the fieldbus master station to the drive through the adapter
module. The drive switches between its states according to the bit-
coded instructions in the Control word and returns status
information to the master in the Status word (PROFIdrive
parameter 968).
The contents of the Control word and the Status word are detailed
below. See the drive documentation for information on the drive-
specific bits. The drive states are presented on page 312. The
drive states for the positioning mode are presented on page 313.
Control word contents
The table below shows the contents of the Control word for the
PROFIdrive communication profile (PROFIdrive parameter 967).
The upper case boldface text refers to the states shown in the
state machine on page 312.
Bit Name Value
STATE/Description
Speed control mode Positioning mode
0 ON 1 Proceed to READY TO OPERATE.
OFF1 0 Emergency OFF, stop by the selected
deceleration ramp. Proceed to OFF1
ACTIVE; proceed further to READY TO
SWITCH ON unless other interlocks
(OFF2, OFF3) are active.
1 OFF2 1 Continue operation (OFF2 inactive).
0 Emergency OFF, coast to stop.
Proceed to OFF2 ACTIVE; proceed further
to SWITCH-ON INHIBIT.
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