ABB RETA-01, User Manual

Page: 49 / 86

Communication profiles
49
Figure 11. State transition diagram
Speed Actual (AC/DC Drive Object)
This attribute indicates the actual speed at which the drive is
operating. The units are scaled by the SpeedScale attribute of the
AC/DC Drive Object.
Torque Actual (AC/DC Drive Object)
This attribute indicates the actual torque at which the drive is
operating. The units are scaled by the Torque Scale attribute of
the AC/DC Drive Object.
ABB Drives communication profile
The control word and the status word
The Control Word 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 on the Control
Word, and returns status information to the master in the Status
Word.
Non existent
Not ready
Power on
Power on
Power on AND
Start-up
Ready
state
condition
Enabled
Stopping
Power on AND
not RDY RDY
FWD OR REV
DEC=0
Fault stop
ALM=1
Faulted
FaultRst
ALM=1
ALM=1
DEC=0
Power off
DEC=1
ALM=1