Rockwell Automation 1397 DC Drive Firmware 2.xx User Manual

Page 205

5–95

Programming Parameters

Publication 1397-5.0 — June, 2001

Process PI

[OCL Ref Rounding] — P.300

Specifies the amount of reference smoothing
(rounding) for the outer control loop. It is set
as a percentage of the [OCL Ramp Time].
Rounding is performed at the beginning and
end of an OCL reference change.

Display/Drive Units:

Parameter Range:

0 to 50%

Default Setting:

Parameter Type:

Tunable

Group:

Process PI

Minimum Value:

Factory Default:

Maximum Value

50%

If [OCL Ref Rounding] is set to 0%, the OCL performs a linear ramp function. If set to 50%, the entire ramp time is smoothed: 50% at the
beginning of the reference change and 50% at the end.

If [OCL Ref Ramp Time] is 0.0 (ramp block bypassed), this parameter has no affect on the OCL reference signal.

Refer to the [OCL Ramp Time] block diagram for additional information.

[OCL Ref Source] — P.301

Selects the reference for the outer control
loop.

If Register is selected, the reference is
obtained from the [OCL Reference].

The I/O Expansion Kit must be installed to
use Analog In 3 (terminals 50 and 51 on the
I/O expansion board), Analog In 4 (terminals
52 and 53), or Frequency In (terminal 39, 40,
and 41).