Alpha 6000 - Running at Frequency Lower Limit; Zero-Speed Running

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Chapter 5 Parameter Introductions

P2.04 Frequency lower limit deal mode

Range: 0,1【0】

0: Run at Frequency lower limit 1: Run at zero-speed.

Note:

 If setting is 0, when the reference frequency is lower than frequency lower limit, the

inverter will run at frequency lower limit instead of reference frequency. As shown

in Fig. 5-2-3.

Operation Freq.(Hz)

Lower limit

Frequency

Time

Reference

Frequency 2

Reference

Frequency 1

Fig. 5-2-3 Running at Frequency lower limit

 If setting is 1, when reference frequency is lower than frequency lower limit, the

inverter will run at frequency lower limit first and last the delay time set by P3.22,

then run at zero-speed. As shown in Fig.5-2-4.

Operation Freq.(Hz)

Frequency

lower limit

Time

Reference

Freq. 2

Reference

Freq. 1

Frequency lower limit arrivied delay time(P3.22)

Fig. 5-2-4 Zero-speed running

 If standby function is enabled and the inverter is just in the standby operating mode,

regardless of the value of P2.04, the inverter will run at zero-speed.

P2.05 Frequency departure setting

Range: 0.00~2.50Hz【0.00Hz】

Note:

 This function is used to prevent the fluctuations of analog input and reduce the

influence to output frequency. The backlash is 20% of frequency departure setting.

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