Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 User Manual
Page 72
12-4
WebPak 3000 DC Drive Application Workbook, Version 1.1
▲
Verify that
TEN
LEADLAG
SELECT
(P.837) is set to
LAG
/
LEAD
, and the values are
set in accordance with section 12.2.
▲
Set
TEN
RAMP
TIME
(P.833) to its minimum value (0.1 seconds).
▲
Set the line speed reference at 20% of maximum.
▲
Set
TENSION
SETPOINT
SEL
(P.855) to
REGISTER
, and set the register value to
200, which is approximately 5% of maximum.
▲
Set
TEN
PI
PROP
GAIN
(P.841) to 2.0
.
▲
With material in the machine, start the drive by asserting the
SECTION
RUN
and
TENSION
ON
digital inputs.
▲
Change the register value to 400, which will step the tension reference 5%.
▲
Connect the tension feedback signal to a strip chart recorder or oscilloscope.
▲
Verify that a 5% step in tension reference will result in a rise time to peak in
1.0 seconds.
▲
If necessary, tune the proportional gain (P.841) and lead frequency (P.840) for
the desired 1.0 second rise time.
▲
Reset all parameters except P.841 to their normal settings.
!
ATTENTION: The user must read and understand the drive sequencing
description and state diagram (figure 3.3 in the WebPak 3000 software
manual, D2-3444) before using the
TENSION
ON
input. Setting
OCL
SELECT
(P.817) to any option but
NONE
permits the
TENSION
ON
input to start the
drive. Once the
TENSION
ON
input is permitted to start the drive, negating
the
TENSION
ON
input while in any state other than the stall tension state
will not stop the drive. Failure to observe this precaution could result in
severe bodily injury or loss of life.
Range:
LEAD
/
LAG
,
BYPASS
,
LAG
/
LEAD
P.837 =
Range: 0.1 to 60.0
SECONDS
P.833 =
SECONDS
Range:
REGISTER
,
ANALOG
P.855 =
5(*,67(5
Range: 0.001 to 32.767
P.841 =
!
ATTENTION: Depending on machine losses, the 5% tension step
required in the following steps may accelerate the motor above 20% line
speed. The user must be ready to shut the drive down in case of
overspeed. Failure to observe this precaution could result in severe bodily
injury or loss of life.