305
5. PARAMETERS
5.8 (M) Monitor display and monitor output signal
3
4
5
5
5
6
7
8
9
10
5.8.7 Output frequency detection
The inverter output frequency is detected and output as output signals.
Output up-to-frequency sensitivity (SU signal, Pr.41)
• Up to frequency (SU) is output when the output frequency reaches the set frequency.
• The Pr.41 value can be adjusted within the range ±1% to ±100% considering the set frequency as 100%.
• This parameter can be used to check that the set frequency has been reached, and provide signals such as the operation
start signal for related equipment.
Output frequency detection (FU (FB) signal, FU2 (FB2) signal, Pr.42,
Pr.43, Pr.50)
• The Output frequency detection (FU/FU2) signal or the Speed detection (FB/FB2) signal is useful for applying or releasing
electromagnetic brake, etc.
• The FU signal is output when the output frequency (frequency command value) reaches or exceeds the Pr.42 setting.
• During PM motor control, the FB signal is output when the estimated actual motor rotations per minute reaches the Pr.42
setting. Under V/F control and Advanced magnetic flux vector control, the FU signal and the FB signal are output at the
same time.
• The frequency detection dedicated to motor rotation in reverse direction is enabled by setting the frequency in Pr.43.
• When Pr.43 ≠ "9999", forward rotation uses the Pr.42 setting and reverse rotation uses the Pr.43 setting.
• When outputting a frequency detection signal separately from the FU (FB) signal, set the detection frequency in Pr.50.
When the output frequency reaches the Pr.50 setting or higher, the FU2 (FB2) signal is output.
Pr. Name Initial value Setting range Description
41
M441
Up-to-frequency sensitivity 10% 0 to 100% Set the level where the SU signal turns ON.
42
M442
Output frequency
detection
6 Hz 0 to 590 Hz Set the frequency where the FU (FB) signal turns ON.
43
M443
Output frequency
detection for reverse
rotation
9999 0 to 590 Hz Set the frequency where the FU (FB) signal turns ON in
reverse rotation.
9999 Same as the Pr.42 setting.
50
M444
Second output frequency
detection
30 Hz 0 to 590 Hz Set the frequency where the FU2 (FB2) signal turns ON.
870
M400
Speed detection hysteresis 0 Hz 0 to 5 Hz Set the hysteresis width for the detected frequency.
Output frequency
(Hz)
ON
Set frequency Adjustment
range
Pr.41
SU
Time
OFFOFF
Forward
rotation
Pr.50
Pr.42
Pr.43
Pr.50
OFFONOFFONOFF
Time
FU (FB)
FU2 (FB2)
Output
signal
OFF ON OFF ON OFF
Reverse
rotation
Output frequency
(Estimated actual speed)
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