ABB FSCA-01, User Manual

Page: 61 / 90

Communication profiles 61
ABB Drives communication profile

Control word and Status word
The Control word is the principal means for controlling the drive
from a fieldbus system. The fieldbus master station sends the
Control word 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 client in
the Status word.
The contents of the Control word and the Status word are detailed
below. The drive states are presented on page 65 .
Control word contents
The table below shows the contents of the Control word for the
ABB Drives communication profile. The upper case boldface text
refers to the states shown in the state machine on page 65 .
Bit Name Value STATE/Description
0 OFF1_
CONTROL 1 Proceed to READY TO OPERATE .
0 Stop along currently active deceleration
ramp. Proceed to
OFF1 ACTIVE ; proceed
to READY TO SWITCH ON unless other
interlocks (OFF2, OFF3) are active.
1 OFF2_
CONTROL 1 Continue operation (OFF2 inactive).
0 Emergency OFF, coast to stop.
Proceed to
OFF2 ACTIVE , proceed to
SWITCH-ON INHIBITED .
2 OFF3_
CONTROL 1 Continue operation (OFF3 inactive).
0 Emergency stop, stop within time defined
by drive parameter. Proceed to
OFF3
ACTIVE ; proceed to SWITCH-ON
INHIBITED .
Warning: Ensure that motor and driven
machine can be stopped using this stop
mode.