ABB ACS 400 User Manual page 122

Emergency Stop
OFF3 (CW Bit2=0)
(SW Bit5=0)
* This state transition occurs also if the fault is reset
from any other source (e.g. digital input).
State
CW = Control Word
SW = Status Word
Figure 43 The state machine for evaluation of start and stop signals.
112
From any state From any state
OFF2
OFF3
ACTIVE
ACTIVE
f=0 / I=0
From any state
OFF1 (CW Bit0=0)
Power ON
f=0 / I=0
(CW Bit3=0)
(SW Bit2=0)
(CW Bit5=0)
(CW Bit6=0)
I = Output current
f = Output frequency
RFG = Ramp Function Generator
From any state
Emergency Off
OFF2 (CW Bit1=0)
(SW Bit4=0)
SWITCH-ON
POWER OFF
INHIBITED
A C D
NOT READY
TO SWITCH ON
OPERATION
INHIBITED
SWITCH ON
C D
READY TO
OPERATE
D
OPERATION
ENABLED
A
RFG: ACCELERATOR
C
OPERATING
D
Fault
(SW Bit3=1)
FAULT
(CW Bit7=1)*
(SW Bit6=1)
(CW Bit0=0)
SW Bit0=0
(
(CW xxxx xxxx xxxx x110)
READY TO
(SW Bit0=1)
(CW xxxx xxxx xxxx x111)
(SW Bit1=1)
(CW Bit3=1 and
SW Bit12=1)
(SW Bit2=1)
(CW Bit5=1)
ENABLED
(CW Bit6=1)
(SW Bit8=1)
ACS 400 User's Manual
)