Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 34)

4-14 FlexPak 3000 DC Drive Software Reference
ANALOG MAN TRIM REF (P.194)
The trim reference
value used when
TRIM REFERENCE
SELECT (P.108) is set
to ANALOG MANUAL .
Parameter Range: n/a
Default Setting: n/a
Parameter Type: Output
OIM Menu Path(s): Drive Reference - Drive Reference Scaling
Drive Reference - Drive Reference Test Points
DRAW PERCENTAGE OUT (P.196)
The product of the
selected trim
reference value and
TRIM RANGE value.
Parameter Range: n/a
Default Setting: n/a
Parameter Type: Output
OIM Menu Path(s): Drive Reference - Drive Reference Test Points
DRAW PERCENTAGE OUT dynamically changes the acceleration and deceleration
rates when TRIM MODE SELECT is set to PROPORTIONAL .
DRAW PERCENTAGE OUT is also used to generate the TRIM OUTPUT signal, which
modifies the speed reference signal when TRIM MODE SELECT is set to
PROPORTIONAL or INCREMENTAL .
TRIM MODE SELECT (P.110)
Selects the type of
trim mode to be used
by the drive. Parameter Range: NO TRIM
INCREMENTAL
PROPORTIONAL
Default Setting: NO TRIM
Parameter Type: Tunable
OIM Menu Path(s): Drive Reference - Drive Reference Trim
•
NO TRIM : No trim is used.
•
INCREMENTAL : Depending on the polarity of the trim reference, adds to or
subtracts from the speed reference a constant value that is proportional to TOP
SPEED (P.011).
•
PROPORTIONAL : Depending on the polarity of the trim reference, adds to or
subtracts from the speed reference a value that varies based on the speed
reference value. Proportional trim allows multiple drive sections with a common
reference to operate and ramp at different values.
Proportional is a type of draw. By using draw, one section can operate 10% faster
than an upstream section. When a ramp occurs on the common reference, the
two sections will support the 10% draw throughout the ramp.
S - CURVE ROUNDING
will interfere with the acceleration and deceleration rates so that the draw will not
be constant. Therefore, it is recommended that
S - CURVE ROUNDING be set to 0%
when TRIM MODE SELECT is set to PROPORTIONAL . Incremental trim is not affected
by this limitation.