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Fieldbus control through the embedded fieldbus interface (EFB) 691
State transition diagram
The diagram below shows the state transitions in the drive when the drive is using the
ABB Drives profile, and configured to follow the commands of the control word from
the embedded fieldbus interface. The upper case texts refer to the states which are
used in the tables representing the fieldbus Control and Status words. See sections
Control Word
on page
MAINS OFF
Power ON
A B C D
(CW Bit3=0)
OPERATION
INHIBITED
operation
inhibited
from any state
OFF1 (CW Bit0=0)
OFF1
ACTIVE
n(f)=0 / I=0
B C D
(CW Bit4=0)
(CW Bit5=0)
(CW Bit6=0)
688
and
Status Word
SWITCH-ON
INHIBITED
(CW Bit0=0)
NOT READY TO
SWITCH ON
(CW=xxxx x1xx xxxx x110)
READY TO
SWITCH ON
(SW Bit2=0)
(CW=xxxx x1xx xxxx x111)
READY TO
OPERATE
(CW=xxxx x1xx xxxx 1111
and SW Bit12=1)
(SW Bit1=0)
(CW Bit3=1
and
SW Bit12=1)
OPERATION
C D
ENABLED
A
(CW=xxxx x1xx xxx1 1111)
RFG: OUTPUT
D
ENABLED
B
(CW=xxxx x1xx xx11 1111)
RFG: ACCELERATOR
ENABLED
C
(CW=xxxx x1xx x111 1111)
OPERATION
D
on page 690.
(SW Bit6=1)
(SW Bit0=0)
(SW Bit0=1)
from any state
(SW Bit1=1)
from any state
from any state
Emergency Stop
OFF3 (CW Bit2=0)
OFF3
ACTIVE
(SW Bit5=0)
n(f)=0 / I=0
(SW Bit2=1)
(SW Bit8=1)
ABB Drives profile
CW = Control Word
SW = Status Word
n = Speed
I = Input Current
RFG = Ramp Function
Generator
f = Frequency
Fault
FAULT
(SW Bit3=1)
(CW Bit7=1)
Emergency OFF
OFF2 (CW Bit1=0)
OFF2
ACTIVE
(SW Bit4=0)
STATE
condition
rising edge
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