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Parameters 163
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
ACS380 FW.book Page 163 Friday, May 4, 2018 4:18 PM
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