Yaskawa iQpump Controller Programming Manual Manuel d'utilisateur télécharger pdf (Page 119)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 119

L3 Stall Prevention

◆ L3-01 Stall Prevention Selection During Accel

◆ L3-02 Stall Prevention Level During Accel

Setting Range: 0 ~ 200% of the iQpump drive rated output current

Factory Default: 120% of the iQpump drive rated output current

The stall prevention during acceleration function adjusts the acceleration time in order to prevent OC fault trips during acceleration. If

L3-01 = “0: Disabled,” stall prevention is disabled. If the load is large enough and the acceleration time short enough the iQpump drive

may fault and stop.

If L3-01 = “1: General Purpose,” then the standard stall prevention function is enabled. When the output current exceeds the level set by

the L3-02 parameter, the iQpump drive will discontinue accelerating and maintain speed. If, during acceleration, the output current comes

within 15% of the level set by parameter L3-02, the acceleration time is lengthened. Once the output current level has dropped below the

L3-02 level, acceleration will begin again with the acceleration rate reaching the programmed rate once again 15% below the L3-02 level.

Figure 1.96

Figure 100. Detailed Time Chart for Stall Prevention During Acceleration

If L3-01 = “2: Intelligent,” the intelligent stall prevention is enabled. The active acceleration time is ignored and the iQpump drive will

attempt to accelerate as quickly as possible without exceeding the L3-02 output current level.

Important: Stall Prevention during Acceleration is not effective when the output frequency is less than 6 Hz.

The following Figure 101. demonstrates acceleration when L3-01 = “1: General Purpose”.

Setting Description

0Disabled

1 General Purpose (factory default)

2 Intelligent

Stall level during

acceleration

Time

Output frequency

Output frequency is controlled

to prevent the motor stalling.

-15%

Output Current

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 301 302

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Yaskawa iQpump Controller Programming Manual Manuel d'utilisateur Page 119