ACH550-UH User’s Manual
1-251
Embedded fieldbus
DCU profile
The following tables describe the
CONTROL
WORD
content for the DCU profile.
7
RESET
0=>1
RESET
Fault reset if an active fault exists (Enter
SWITCH
-
ON
INHIBITED
). Effective if 1604 =
COMM
.
0
OPERATING
Continue normal operation
8…9
Unused
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
EXT
2
SELECT
Select external control location 2 (
EXT
2).
Effective if 1102 =
COMM
.
0
EXT
1
SELECT
Select external control location 1 (
EXT
1).
Effective if 1102 =
COMM
.
12…15
Unused
DCU Profile
CONTROL
WORD
(See Parameter 0301)
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)
1
START
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 drive 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)
ABB Drives Profile (EFB)
CONTROL
WORD
Bit
Name
Value
Commanded
State
Comments
=
/
=
/
Summary of Contents for ACH550-UH HVAC
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Page 8: ...1 8 ACH550 UH User s Manual Table of contents ...
Page 32: ...1 32 ACH550 UH User s Manual Installation ...
Page 66: ...1 66 ACH550 UH User s Manual Application macros ...
Page 186: ...1 186 ACH550 UH User s Manual Parameters ...
Page 333: ...ACH550 UH User s Manual 1 333 Technical data ...