Fieldbus control with the embedded fieldbus 303
The table below and the state diagram on page
describe the Control word
content for the ABB drives profile. The upper case boldface text refers to the states
shown in the diagram.
ABB drives profile Control word, parameter
Bit
Name
Value
Comments
0
OFF1 CONTROL 1
Enter
READY TO OPERATE.
0
Stop along currently active deceleration ramp (
).
Enter OFF1 ACTIVE; proceed to READY TO SWITCH ON
unless other interlocks (OFF2, OFF3) are active.
1
OFF2 CONTROL 1
Continue operation (OFF2 inactive).
0
Emergency OFF, drive coast to stop.
Enter
OFF2 ACTIVE
; proceed to
SWITCH-ON INHIBITED
.
2
OFF3 CONTROL 1
Continue operation (OFF3 inactive).
0
Emergency stop, drive stops within time defined by par.
. Enter
OFF3 ACTIVE
; proceed to
SWITCH-ON
INHIBITED
.
WARNING:
Ensure motor and driven machine can be
stopped using this stop mode.
3
INHIBIT
OPERATION
1
Enter
OPERATION ENABLED
. (
Note:
The Run enable
signal must be active; see parameter
. If par.
is
set to
, this bit also activates the Run enable signal.)
0
Inhibit operation. Enter
OPERATION INHIBITED
.
4
Note:
profile.
RAMP_OUT_
ZERO (
1
Enter
RAMP FUNCTION GENERATOR: OUTPUT
ENABLED
.
0
Force Ramp function generator output to zero.
Drive ramps to stop (current and DC voltage limits in force).
5
RAMP_HOLD
1
Enable ramp function.
Enter
RAMP FUNCTION GENERATOR: ACCELERATOR
ENABLED
.
0
Halt ramping (Ramp function generator output held).
6
RAMP_IN_
ZERO
1
Normal operation. Enter
OPERATING
.
0
Force Ramp function generator input to zero.
7
RESET
0=>1
Fault reset if an active fault exists. Enter
SWITCH-ON
INHIBITED
.
Effective if par.
is set to
0
Continue normal operation.
8…
9
Not in use
10
Note:
REMOTE_CMD
(
)
1
Fieldbus control enabled.
0
Control word 0 or Reference 0: Retain last Control word
and Reference.
Control word = 0 and Reference = 0: Fieldbus control
enabled.
Reference and deceleration/acceleration ramp are locked.
11
EXT CTRL LOC
1
Select external control location EXT2. Effective if par.
is set to
0
Select external control location EXT1. Effective if par.
is set to
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