Altivar 16 AC Drive Configuration and adjustment of parameters with options Speed range Function The two frequency limits, HSP and LSP, define the speed range permitted under operating conditions. Applications All applications. Adjustments f (Hz) HSP LSP LSP : 0 to HSP, preset to 0 HSP : LSP to tFr, preset to 50 if FrS = 50, or 60 if FrS = 60 0 V 0 mA 4 mA 10 V 20 mA 20 mA Reference Frequency loop gain Function Drive compensates for variances in machine load to improve performance during transient phases. Applications All applications, from machines with fast cycles and low inertia to high inertia applications. Adjustments FLG: 0 to 99, preset to 33 From 33 to 0:
reduction of gain (machine with high resistive torque or high inertia) From 33 to 99: increase of gain (machine with fast cycles and low inertia) Code nFL: no frequency loop Example 1 Example 2 I N t t Instability of motor current Overspeed during a transient phase In each case, reduce the gain. Slip compensation Function Maintain a constant speed to the motor for a given reference as the load changes, automatically correcting the frequency. Applications All applications which require a broad speed range with wide variations in resistive torque. Adjustment SLP: yes or no, preset to yes. With slip compensation T Slip compensation must be inhibited in the following cases:
- High inertia machines - Synchronous reluctance motor - Variable torque applications (pumps and fans) T2 T1 With the VW3A1604 option, adjustment is possible from 0 to 5 Hz. f 17