WEG SSW-06.0205 User Manual page 133

CHAPTER 7 - APPLICATIONS AND PROGRAMMING
Torque
Control
P102
P120 =2
P121
P122

P104 0
P125 =1
P126
P127
Torque
Control
P102
P120 =2
P121
P122

P104 0
P125 =2
P126
P127
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Stopping (P1240 and P125=1):
1) In most applications only the constant toque control can be used for
P400
pump stopping, 1 point=constant;
2) This method is used for water columns that are not very high;
P401
3) Set P126 initially to the same value of P121, provided it is correct;
4) Set P126 in such a way that at the end of the pump stopping process
P402
the motor is not still enabled;
5) As soon as the pump is disabled, a gradual pressure drop should be
P404
noted without significant pressure oscillation, mainly at the end of the
stop, when the retaining valve is closed.
P405
P406
P640
Stopping (P1240 and P125=2):
1) Linear deceleration torque, 2 points=linear;
2) Applied to high water columns;
3) At first you can set P126 for 10% to 15% lower than the value of P121,
P400
provided this value is correct;
4) Set P127 so that when the beginning of the stopping process, the pressure
P401
decreases gradually and no sudden pressure oscillation occurs;
5) Set P126 so that at the end of the pump stopping process the motor is
P402
not still enabled.
P404
P405
P406
P640
Tn(%)
Start
Load Torque
P121
0
P102
Maximum Time
Enable Torque Control
Figure 7.19 – Hydraulic pump stopping with constant torque, 1 point
Tn(%)
Start
Load Torque
P121
0 P102
Maximum Time
Enable Torque Control
Figure 7.20 – Hydraulic pump stopping with linear torque, 2 points
Speed
P122
Tn Nominal
P128
P104
Disable
Speed
P122
Tn Nominal
P127
P128
P104
Disable
P126
t(s)
P126
t(s)