Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 98)

9-4 FlexPak 3000 DC Drive Software Reference
9.2 Outer Control Loop Signal Processing
The OCL reference signal passes through a reference and a forward path.
9.2.1 Configuring the OCL Reference Path
You can configure the OCL to include an S-curve block. This prevents the
speed/voltage loop from being “jerked” when the OCL is enabled. The S-curve block
output ramps smoothly from the OCL FEEDBACK (P.847) value to the OCL reference
setpoint to reduce mechanical wear.
The OCL reference signal is fed into the S-curve block, where it is modified by OCL REF
RAMP TIME (P.802) and OCL REF ROUNDING (P.803). These parameters determine the
amount of rounding and minimum amount of time of the OCL reference ramp when the
OCL S-curve block output changes from 0 to full scale and vice versa. Rounding is
performed at the beginning and end of an OCL reference change.
You can check the output of the block through OCL RAMP OUTPUT (P.846).
DIG IN
5 (P.499)
State of the outer
control loop enable
input (terminal 64 on
the I/O Expansion
kit). Parameter Range: ON
OFF
Default Setting: n/a
Parameter Type: Output
OIM Menu Path(s): Input/Output - Digital I/O
DIG IN 5 is ON when +24VDC is applied for more than 10 msec. It is OFF when 0VDC
is applied.
OCL ENABLE
(P.849)
The status of the OCL
enable signal. OFF
indicates the OCL is
disabled (held in
reset).
ON means it is
operating.
Parameter Range: ON
OFF
Default Setting: n/a
Parameter Type: Output
OIM Menu Path(s): Outer Control Loop ( OCL ) - OCL Test Points
OCL RAMP OUTPUT (P.846)
The outer control
loop reference
S-curve block output
in
OCL user-defined
units.
Parameter Range: n/a
Default Setting: n/a
Parameter Type: Output
OIM Menu Path(s): Outer Control Loop ( OCL ) - OCL Test Points