2-184 ACH550 E-Clipse Bypass User’s Manual
Embedded fieldbus
DCU profile
The following tables describe the
CONTROL WORD content for the DCU profile.
10 Unused (ABB DRV LIM)
REMOTE_CMD
(
ABB DRV FULL)
1 Fieldbus control enabled.
0 • CW 0 or Ref 0: Retain last CW and
Ref.
• CW = 0 and Ref = 0: Fieldbus control
enabled.
• Ref and deceleration/acceleration ramp
are locked.
11 EXT CTRL LOC 1
EXT2 SELECT Select external control location 2 (EXT2).
Effective if 1102 =
COMM.
0
EXT1 SELECT Select external control location 1 (EXT1).
Effective if 1102 =
COMM.
12…15 Unused
DCU Profile CONTROL WORD
Bit Name Value Command/Req. Comments
0 STOP 1 Stop Stops according to either the stop
mode parameter or the stop mode
requests (bits 7 and 8).
Simultaneous STOP and START
commands result in a stop command.
0 (no op)
1START 1 Start
0 (no op)
2 REVERSE 1 Reverse direction This bit XOR’d with the sign of the
reference defines direction.
0 Forward direction
3 LOCAL 1 Local mode When the fieldbus sets this bit, it steals
control and the bypass moves to
fieldbus local control mode.
0 External mode
4 RESET -> 1 Reset Edge sensitive.
other (no op)
5 EXT2 1 Switch to EXT2
0 Switch to EXT1
6 RUN_DISABLE 1 Run disable Inverted run enable.
0 Run enable on
7 STPMODE_R 1 Normal ramp stop
mode
0 (no op)
8 STPMODE_EM 1 Emergency ramp
stop mode
0 (no op)
9 STPMODE_C 1 Coast stop mode
0 (no op)
ABB Drives Profile (EFB)
CONTROL WORD
Bit Name Value
Commanded
State
Comments
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