ABB ACS280, Firmware Manual, Page: 133 / 430

Parameters 133
20.21 Direction
Reference direction lock. Defines the direction of the
drive rather than the sign of the reference, except in
some cases.
In the table the actual drive rotation is shown as a
function of parameter
20.21 Direction
and Direction
command (from parameter 20.01 Ext2 commands or
20.06 Ext2 commands
).
Request
Request In external control the direction is selected by a
direction command (parameter 20.01 Ext2 commands
or
20.06 Ext2 commands
).
If the reference comes from Constant (constant
speeds/frequencies), Motor potentiometer, PID, Fail,
Last (last speed reference), Jogging (jogging speed)
or Panel reference, the reference is used as is.
If the reference comes from a fieldbus:
• if the direction command is forward, the reference
is used as is
• if the direction command is reverse, the reference
is multiplied by -1.
0
Forward Motor rotates forward regardless of the sign of the
external reference. (Negative reference values are
replaced by zero. Positive reference values are used as
is.)
1
Reverse Motor rotates reverse regardless of the sign of the
external reference. (Negative reference values are
replaced by zero. Positive reference values are
multiplied by -1.)
2
No. Name/Value Description Default
FbEq 16
Direction command =
Forward Direction command =
Reverse Direction command not
defined
Par.
20.21
Direction
=
Forward
Forward Forward Forward
Par.
20.21
Direction =
Reverse
Reverse Reverse Reverse
Par. 20.21
Direction =
Request
Forward, but
• If reference from
Constant, Motor
potentiometer, PID,
Safe speed, Last,
Jogging or Panel
reference, reference
used as is.
• If reference from the
network, reference
used as is.
Reverse, but
• If reference from
Constant, PID or Jogging
reference, reference used
as is.
• If reference from the
network, Panel, Analog
input, Motor
potentiometer, Safe
speed or Last reference,
reference multiplied by -1.
Forward