ABB ACS550-01 - Page 176

176 ACS550 User’s Manual
Embedded Fieldbus
The state diagram below describes the start-stop function of CONTROL WORD (CW)
and
STATUS WORD (SW) bits for the ABB Drives profile.
(CW xxxx x1xx xxxx x110)
MAINS OFF
Power ON (CW Bit0=0)
(SW Bit6=1)
(SW Bit0=0)
From any state
n(f)=0 / I=0
OFF1 (CW Bit0=0)
ACD
(CW Bit3=0)
(SW Bit2=0)
(SW Bit0=1)
(CW= xxxx x1xx xxxx x111)
(SW Bit1=1)
(CW Bit3=1 and
(CW Bit4=0)*
n(f)=0 / I=0
From any state
SWITCH-ON
INHIBITED
NOT READY
TO SWITCH ON
OPERATION
INHIBITED
READY TO
SWITCH ON
READY TO
OPERATE
RFG OUTPUT
ENABLED*
C* D*
From any state
Emergency Off
OFF2 (CW Bit1=0)
(SW Bit4=0)
OFF2
ACTIVE
From any state
Fault
(SW Bit3=1)
FAULT
(CW Bit7=1)**
(SW Bit5=0)
Emergency Stop
OFF3 (CW Bit2=0)
SW Bit12=1)
RFG: ACCELERATOR
ENABLED
(CW=xxxx x1xx xx11* 1111
(CW Bit6=0)
C
(CW=xxxx x1xx x111* 1111
(SW Bit8=1)
D
B*
D
OPERATING
OFF3
ACTIVE
KEY
State
State change
Path described in example
CW =
CONTROL WORD
SW = STATUS WORD
RFG = Ramp Function Generator
I = Param. 0104
CURRENT
f = Param. 0103 OUTPUT FREQ
n = Speed
* Indicates the features not in ABB DRV LIM
** This state transition also occurs if the fault is
reset
from any other source (e.g. digital input).
(SW Bit2=1)
OPERATION
ENABLED
(CW=xxxx x1xx xxx1* 1111
A
(CW Bit5=0)
CD
B*
B*
(SW Bit1=0)
OFF1
ACTIVE
OPERATION INHIBITED
i.e. Bit 4=1)*
i.e. Bit 5=1)
i.e. Bit 6=1)