Company Registered in England No: 4167649 VAT Registration No: 732 5692 25 BS EN ISO 9001:2008 No: LRQ 0964389
+44 (0)1204 699959
Hyquip Limited New Brunswick Street Horwich Bolton Lancashire BL6 7JB UK
www.hyquip.co.uk/web/index
9
RE 30 255-B/05.00
+
2
%+
100
%
–
100
%
S–
G–
S+
G+
–
2
%
Product description and commissioning instructions VT-SWKA-1
3. Functional description / commissioning notes
3.11 Ramp time selection logic [10]
a) Operating mode "4-quadrant operation"
When 4-quadrant operation is activated (24V signal “4Q”), the electronics automatically
recognizes the command value polarity and the direction of change of the command value
and assigns a ramp time to the current signal status. Depending on these signal states, one
of the 4 ramp times is selected.
Ramp up, positive →Ramp potentiometer “t1”
Ramp down, positive →Ramp potentiometer “t2”
Ramp up, negative →Ramp potentiometer “t3”
Ramp down, negative →Ramp potentiometer “t4”
4-quadrant operation has a higher priority than all ramp time call-ups. As long as a signal
changes, the LED (on the front panel, directly next to the associated potentiometer) assigned
to the current ramp time lights up.
Note: In the case of very short ramp times, the LEDs' lighting up can no longer be noticed.
LED “4Q” on the front panel is on when quadrant recognition is active.
b) Ramp time call-ups
When operating mode "4-quadrant operation" is deactivated,4 ramp times can be called up
using an optional call-up signal (24V input). Only 1 call-up is possible at a time. If several
call-ups are activated at the same time, call-up “1” has the lowest priority and call-up “4”
has highest priority. Each called-up ramp time is signaled by a yellow LED (on the front panel,
directly next to the associated potentiometer).
c) 5th ramp time
If neither quadrant recognition nor a call-up is activated, ramp time "t5"
is always valid.
3.12 Characteristic curve generator [12]
The adjustable characteristic curve generator can be used to adjust step-change heights and
maximum values separately for positive and negative signals according to the hydraulic re-
quirements. The actual characteristic curve shape through the zero point is not step-like, but
linear.
The step-change height can be adjusted by means of potentiometers "S+" and "S–".
Jumper J4 can be used to activate the step function. For this, the connection 2-3 of jumper J4
must be plugged (factory setting: connection 1-2 →step function OFF). To prevent a re-
sidual step-change (< 1 %) when the step function is deactivated, the potentiometers “S+”
and S–“ must be turned to the left-hand stop and the connection 1-2 of jumper J4 must be
plugged.
The maximum command value can be adjusted by means of potentiometers “Gw+” and
“Gw–”. The adjustment range is between 0 % and 110 %.
3.13 Amplitude limiter [13]
The control variables (current output and voltage output) are limited to approx. ±110 % of
the nominal range.
← Internal command value →
←Command value preselection →
