ABB ACS550 - Page 235

ACS550 User’s Manual 235
Fieldbus adapter
The state diagram below describes the start-stop function of CONTROL WORD (CW)
and
STATUS WORD (SW) bits.
(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
CD
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
CW =
CONTROL WORD
SW = STATUS WORD
RFG = Ramp Function Generator
I = Param. 0104
CURRENT
f = Param. 0103 OUTPUT FREQ
n = Speed
(SW Bit2=1)
OPERATION
ENABLED
(CW=xxxx x1xx xxx1 1111)
A
(CW Bit5=0)
CD
B
B
(SW Bit1=0)
OFF1
ACTIVE
OPERATION INHIBITED