Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 41)

Configuring the Speed Reference 4-21
REVERSE DISABLE (P.015)
When ON , REVERSE
DISABLE does not
allow the speed
reference to drop
below zero.
When OFF , the speed
reference can drop
below zero and the
drive can operate in
the reverse direction.
Parameter Range: OFF
ON
Default Setting: OFF
Parameter Type: Configurable
OIM Menu Path(s): Drive Reference - Drive Reference Limits
Quick Start
REVERSE DISABLE applies only to regenerative drives.
REVERSE DISABLE is forced to ON when:
• The drive has a non-regenerative (S6) power unit.
•
FEEDBACK SELECT is set to AC TACH .
•
FEEDBACK SELECT is PULSE TACH and PULSE TACH QUADRATURE (P.208) is OFF .
S - CURVE ROUNDING (P.014)
The amount of
reference smoothing
(rounding) of the
speed loop S-curve
output. Parameter Range: 0 to 50%
Default Setting: 0%
Parameter Type: Tunable
OIM Menu Path(s): Drive Reference - Drive Reference Ramp
S - CURVE ROUNDING is set as a percentage of ACCELERATION TIME (P.001).
Rounding is performed at the beginning and end of a speed loop reference change.
If TRIM MODE SELECT (P.110) is set to PROPORTIONAL , S - CURVE ROUNDING should be
set to 0%. If there is S-curve rounding and proportional trim, the actual trim will
interfere with the
ACCELERATION TIME and the DECELERATION TIME and draw will not
be constant. If TRIM MODE SELECT (P.110) is set to INCREMENTAL , ACCELERATION TIME
and the DECELERATION TIME are not affected.
If S - CURVE ROUNDING is set to 0%, the speed loop performs a linear ramp function. If
it is set to 50%, the entire ramp time is smoothed: 50% at the beginning and 50% at
the end. Refer to figure 4.6.
Figure 4.6 – S-Curve Rounding