Programming 6-41MN792

Speed Loop Continued
Advanced This function block is shown in Speed Loop
Adaption Adjusts speed loop gain scheduling.
Zero SPD Quench Similar to Standstill logic (i.e. keeps the contactor in but motor current drops to zero) except
the speed loop stays enabled and will cause the current loop to unquench very quickly.
1 SETUP PARAMETERS
2 SPEED LOOP
3 ADVANCED
I Gain in Ramp
POS Loop P Gain
1 SETUP PARAMETERS
2 SPEED LOOP
3 ADVANCED
4 ADAPTION
Mode
Speed BRK1 (Low)
Speed BRK2 (High)
PROP Gain
SPD INT Time
1 SETUP PARAMETERS
2 SPEED LOOP
3 ADVANCED
4 ZERO SPD QUENCH
Zero SPD Level
Zero IAD Level
Parameter Descriptions
Mode
0 – Disabled
1 – Speed Feedback Dependent
2 – Speed Error Dependent
3 – Current Demand Dependent
Range: 0 to 3
SPD BRK 1 (Low)
If Mode = 1 Then BRK–points correspond to speed feedback.
If Mode = 2 Then BRK–points correspond to speed error.
If Mode = 3 Then BRK–points correspond to current demand.
Range: 0.00 to 100.00 %
SPD BRK 2 (High)
Above SPD BRK 2 (HIGH) the normal gains (as per main menu above) prevail. Between the two
breakpoints, a linear variation of the gains is implemented.
Range: 0.00 to 100.00 %
PROP. Gain
Prop gain used below SPD BRK 1 (LOW) Range: 0.00 to 200.00
SPD INT Time
Integral time constant used below SPD BRK 1 (LOW) Range: 0.001 to 30.000
Seconds
I Gain IN Ramp
While the Ramping flag (Tag [113]) is true the integral gain is scaled by I GAIN IN RAMP. This can
be used to help prevent integral windup while the drive is ramping (particularly with high inertia
loads).
Range: 0.0000 to 2.0000
POS. LOOP P GAIN
Reserved parameter. Range: –200.00 to 200.00 %
Zero SPD. Level
Sets the threshold of speed feedback below which Zero Speed Quench is active. Range: 0.00 to 200.00 %
Zero IAD Level
Sets the threshold of current feedback below which Zero Speed Quench is active. Range: 0.00 to 200.00 %