40
Control Keypad
_____________________________________________________________________________________
7.6.5
Stop Parameters
±
page 3
STOP PARAMETERS
- **** -
Displays in MINIMIZED MODE and MAXIMIZED MODE
(refer to section
7.6.3 on page 32 for changing mode)
Display and default
values
Range Description
Remarks
SOFT STOP CURVE
0(STANDARD)
4 (TORQUE)
3 !!
2 !!
1 !!
0
(STANDARD)
6HWVVWDUWHU¶V
SOFT STOP
CURVE.
Refer to section
7.6.5.1 on page 40
DEC. TIME
0 SEC.
0
±
30sec.
Note:
Range can
be extended
to 90sec. by
using the
WIDER
SETTING as
described in
section
7.6.7
page 43.
Sets
DECELERATION
TIME of the
motor.
Used for controlled deceleration of high
IULFWLRQORDGV'HWHUPLQHVPRWRU¶VYROWDJH
ramp down time.
FINAL TORQUE
0 (MIN.)
0 (min.)
±
10
(max.)
Sets FINAL
TORQUE
during Soft Stop.
Determines torque towards end of SOFT
STOP.
If current is still flowing after speed is softly
reduced to zero, increase FINAL TORQUE
setting.
STORE ENABLE
STOP PARAMETERS
Same as STORE ENABLE MAIN
PARAMETERS on page 34.
7.6.5.1
Soft stop parameters
The RVS-DXM
LQFRUSRUDWHV³6WDUWLQJ&XUYHV´HQDEOLQJVHOHFWLRQWKHVXLWDEOHWRUTXHFXUYH
Stop Curve 0
±
Standard curve (Default)
±
voltage is linearly reduced from nominal to zero.
The most stable and suitable curve for the motor, preventing prolonged stopping and motor overheating.
Stop curves 1, 2, 3 Pump Control
±
In some pump applications, when pumping to a higher level, a
considerable part of the torque is constant and does not decrease with speed.
It may happen that during deceleration process, when voltage is decreasing, motor torque quickly falls below
load torque abruptly (instead of smoothly decreasing speed to zero) closing the valve and causing Water
Hammer.
Curves 1, 2 and 3 are intended to prevent Water Hammer phenomenon. In pump applications, load torque
decreases in square relation to the speed, thus correct control of voltage reduction reduces torque adequately
to smoothly decelerate to a stop.
Note
:
It is recommended that for all standard applications (not pumps), Stop Curve 0 will be used.
