Mitsubishi Electric FR-F800, Instruction Manual

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(M) Monitor display and monitor output signal Parameters
5 - 236
Output frequency detection
(FU (FB) signal, FU2 (FB2) signal, Pr. 42, Pr. 43, Pr. 50)
●
Output frequency detection (FU (FB)) is output when the output frequency reaches the Pr. 42
setting or higher.
●
The FU (FU2) signals can be used for electromagnetic brake operation, opening, etc.The FU (FU2)
signal is output when the output frequency (frequency command) reaches the set frequency.
●
During PM motor control, the FB (FB2) signal is output when the estimated actual motor speed
reaches the set frequency (speed). Under V/F control and Advanced magnetic flux vector control,
the FU signal and the FB signal are output at the same time.
●
Frequency detection that is dedicated to reverse rotation can be set by setting the detection
frequency in Pr. 43. This is useful for changing the timing of the electromagnetic brake operation
during forward rotation (lifting) and reverse rotation (lowering) in operations such as lift opera-
tion.
●
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.
●
For each signal, refer to the following table and assign the function by Pr. 190 to Pr. 196 (output
terminal function selection).
I003031E
Fig. 5-98: Frequency detection for forward and reverse rotation
Output signal
Pr. 190 to Pr. 196 settings
Related parameter
Positive logic Negative logic
FU 4 104
42, 43
FB 41 141
FU2 5 105
50
FB2 42 142
Tab. 5-105: Parameter setting for frequency detection for forward and reverse rotation
FU (FB)
FU2 (FB2)
Forward
rotation
Pr. 50
Pr. 42
Ou
tput freq
uenc
y
(Esti
m
at
ed ac
tual
spee
d)
Output
signal
OFF
OFF
OFF
OFF
OFF
OFF
Reverse
rotation
Pr. 43
Pr. 50
Time
ON
ON ON
ON