Alpha 6000S series, Руководство пользователя

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Chapter 5 Detailed Function Introductions
124
Detection width
Time
Time
Reference
Freq.
Operating Freq.(Hz)
FAR signal
Figure. 5-3-8 FAR detection diagram
P3.27 FDT level Setting range: 0.00~Maximum frequency [50.00Hz]
P3.28FDT lag Setting range: 0.00~10.00Hz [1.00Hz]

Note
When the output frequency reaches a certain preset frequency (frequency detection threshold), Y terminal
output will be valid. We called the preset frequency FDT level. In the dropping of output frequency, Y
terminal output keep valid, until the output frequency drops below another certain frequency of FDT level,
which is called release frequency (FDT1 level-FDT1 lag), as shown in Figure. 5-3-9.
FD T lag
Tim e
Tim e
FD T le ve l
O utput Fre q.
FD T signal
Fig. 5-3-9 Frequency detection FDT
P3.29 Frequency upper limit arriving output delay
time Setting range: 0.0~100.0s [0.0s]
P3.30 Frequency lower limit arriving output delay
time Setting range: 0.0~100.0s [0.0s]
Notes:

These two functions are enabled when setting D0, Y1, Y2, Y3, relay 1, relay 2 output (3004GB and below
models set DO, relay 1) in P3.19 ~ P3.25 option as ""FDTH upper limit frequency reaching" or "FDTL lower
limit frequency reaching". Typically, these two functions are set to prevent load joggling and signal instability