Danfoss VLT 8000 AQUA series User Manual

VLT
®
8000 AQUA
Programming
param. 419 ) and continues operation in standard
(normal) "closed loop" mode.
NB!:
The pipe fill closed loop operation is not
started until the PID-start frequences,par.
422 has been reached.
The value to use for the "Filled" Setpoint parameter
231, can be determined by:
1. Use the DISPLAY MODE key on the LCP
to display FEEDBACK 1.
IMPORTANT! Be sure that you have selected the
UNITS in parameter 415 before this step.
2. Operate the VLT 8000 AQUA in HAND mode and
slowly advance the speed to fill the pipe while being
careful not to create a water hammer.
3. An observer at the end of the pipe must be able
to report when the pipe is filled.
4. At that instant, stop the motor, and observe the
value of pressure feedback (have the LCP display
set to observe the feedback before starting).
5. The value of feedback in step 4) is the value to
use in parameter 231 - "Filled" Setpoint.
The value to set in parameter 230 - Fill Rate can
be supplied by the system engineer from proper
calculation or from experience, or it can be determined
experimentally by performing numerous fill mode
sequences and either increasing or decreasing
the value of this parameter to obtain the fastest
fill without causing a water hammer.
230 Fill Rate
(FILL RATE)
Value:
OFF/000000.001 - 999999.999 (units/s) -
✭ OFF
Function:
Establishes the rate at which the pipe
is filled.
Description of choice:
The dimension of this parameter is Units/Second. The
Units will be the value selected in parameter 415.
As an example, the Units could be Bar, or MPa, or
PSI, etc. If Bar is the selected unit in parameter 415,
then the number set in this parameter (230) would
be dimensioned as Bar/Second. Changes to this
parameter can be made in steps of .001 units.
231 Filled Setpoint
(FILLED SETPOINT)
Value:
Param. 413 - Param. 205 -
✭ Param. 413
Function:
The value set in this parameter corresponds to
the pressure that exists at the pressure sensor
when the pipe is filled.
Description of choice:
The Units of this parameter correspond to the units
selected in Parameter 415. The minimum value of
this parameter is Fb
min
(param. 413). The maximum
value for this parameter is Ref
max
(param. 205). The
setpoint can be changed in .01 steps.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
117

Danfoss VLT 8000 AQUA series Specifications

General

Brand	Danfoss
Model	VLT 8000 AQUA series
Category	DC Drives
Language	English