STANDARD CONTROL/DISPLAY OPERATION
42
If the SAVE or RESTORE operation was
successful,
the green LED will light
. For
example, if a SAVE were performed, the
display would be:
S A V E
Green LED Lit
Load Default Function
Every parameter in the drive has a factory-set
default value that is loaded when the drive is
powered up for the very first time. These
default parameters may not be optimal values
for the drive when actually running, but they
will generally allow the drive to function. It is
possible to reload these default parameters
with
Function 995
of the SCDU. A re-load of
the defaults would generally be done when
the drive is operating erratically and it is
suspected that one or more parameters were
improperly set.
CAUTION
Use of the LOAD DEFAULTS function will
overwrite EVERY parameter currently being
used by the drive with the factory set default
for each parameter. There is no way to
restore parameters to their previous value
once this function is used.
Function 995 is used to perform the transfer of
data from the default parameter list to the
ACTIVE RAM parameter list. The process for
accessing the Load Defaults Function is as
follows:
1) Use the
▲
and
▼
keys to select
function 995
from the function level. The two
colored LEDs remain off during this step.
9 9 5
Both LEDs Off
2) Press the DATA/FCTN key to enter the
"Data" level for function 995. The green LED
is now lit to indicate that this function is
currently being accessed. The SCDU will now
display:
L O A d
Green LED Lit
3) Press the ENTER key to actually perform
the Load Defaults transfer. After the transfer
has completed, the SCDU displays the word
'dOnE':
d O n E
Green LED Lit
4) A cycling of control power is then
necessary to implement the default settings
onto the display.
Self Tune Function
The DSD 412 Elevator drive has a built-in
current regulator SELF TUNING function 997.
When activated, this feature measures total
motor armature circuit resistance, inductance
including wiring, and the field L/R time
constant. The drive then uses the measured
value in conjunction with the parameter
entered for “CROSSOVER FREQUENCY” to
calculate integral and proportional gains for
the current regulator and to set the field
regulator gains properly. After running the
Self Tune Parameter Measurement function,
the values for armature resistance and
armature inductance are stored in NVRAM. It
is important to note that it is possible to
override the values that have been
dynamically calculated for Armature
Resistance, Armature Inductance, and Field
L/R Time Constant by the “USE SELF-TUNE”
item in the parameter menu (Function 2). The
dynamically calculated values are used if
“USE SELF-TUNE” is set to “ON” while the
manually entered
values (entered in
parameter’s 4, 6, and 51) are used if this item
is set to “OFF”.
Summary of Contents for DSD 412
Page 1: ...DSD 412 DC Elevator Drive Technical Manual CS00407 rev 06...
Page 6: ...6...
Page 102: ...MAINTENANCE 102 Figure 24 Connector and E prom Locations...
Page 103: ...MAINTENANCE 103 Figure 25 Test Point Locations...
Page 115: ...OUTLINE DRAWING 100A 115 Figure 26 Drive Chassis Outline DSD 412 100 Amp...
Page 116: ...OUTLINE DRAWING 190A 116 Figure 27 Drive Chassis Outline DSD 412 195 Amp...
Page 117: ...OUTLINE DRAWING 300A 117 Figure 28 Drive Chasis Outline DSD 412 300 Amp...
Page 118: ...LAYOUT DRAWING 100A 118 Figure 29 Layout DSD 412 100 Amp A3 A1 A2 A2 L1 NEG GND L2 L3 POS...
Page 119: ...LAYOUT DRAWING 195A 119 Figure 30 Layout DSD 412 195 Amp A3 A1 A2 A2...
Page 120: ...LAYOUT DRAWING 300A 120 Figure 31 Layout DSD 412 300 Amp A3 A1 A2 A2...
Page 121: ......
