Alpha ALPHA6000 Series - Page 125

Chapter 5 Parameter Introductions
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125
The delay time is the transition time at zero frequency when the ac drive switching its
running direction as shown in Fig. 5-2-2 as t
1 .
Operation Freq.(Hz)
Time
t1
Fig. 5-2-2 FWD/REV switching time diagram
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 ac
drive 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 ac
drive 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