ABB ACH550 Bedienungsanleitung Seite 157

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Serial communications 153
ACH550 User's Manual
State Diagram. The state diagram below describes the start-
stop function of CONTROL WORD (CW) and STATUS WORD
(SW) bits.
(
MAINS OFF
Power ON (CW Bit0=0)
(SW Bit6=1)
(SW Bit0=0)
From any state
f=0 / I=0
OFF1 (CW Bit0=0)
ACD
(CW Bit3=0)
(SW Bit2=0)
(SW Bit0=1)
(
(SW Bit1=1)
(CW Bit3=1 and
(CW Bit5=0)
f=0 / I=0
(SW Bit2=1)
SWITCH-ON
INHIBITED
NOT READY
TO SWITCH ON
OPERATION
INHIBITED
READY TO
SWITCH ON
READY TO
OPERATE
OPERATION
ENABLED
CD
Emergency Off
OFF2 (CW Bit1=0)
(SW Bit4=0)
OFF2
ACTIVE
Fault
(SW Bit3=1)
FAULT
(CW Bit7=1)*
(SW Bit5=0)
Emergency Stop
OFF3 (CW Bit2=0)
SW Bit12=1)
RFG: ACCELERATOR
ENABLED
(CW Bit5=1)
(CW Bit6=0)
C
(CW Bit6=1)
(SW Bit8=1)
D
A
D
OPERATING
OFF3
ACTIVE
*
This state transition also occurs if the fault is reset
from any other source (e.g. digital input).
KEY
State
CW =
CONTROL WORD
SW = STATUS WORD
Path described in
example
00Template.book Page 153 Friday, January 2, 2004 2:55 PM
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