Mitsubishi Electric FR-A700 Technical Manual page 78

(3) Detection of output frequency (FU, FU2
* * *
FU3 , FB , FB2 , FB3
(*FU3, FB, FB2, FB3 are not available for
.)
F700
(*FU2,FU3, FB, FB2, FB3 are not available
for .)
E700 D700
The output frequency detection signal (FU (FB)) is
output when the output frequency reaches or
exceeds the [Pr. 42] setting.
FU (FU2, FU3) signal
electromagnetic brake operation, open signal, etc.
The FU (FU2 and FU3) signal is output when the
output frequency reaches the speed command value
and output the FB (FB2, FB3) signal when the output
frequency reaches the actual motor speed (estimated
actual speed value under Real sensorless vector
control, feedback value under vector control). The FU
signal and FB signal are output simultaneously
during V/F control and Advanced magnetic flux
vector control.
When the detection frequency is set in [Pr. 43],
frequency detection used exclusively for reverse
rotation can also be set. This function is effective for
switching the timing of electromagnetic brake
operation between forward rotation (rise) and reverse
rotation (fall) during vertical lift operation, etc.
When [Pr. 43 9999], the [Pr. 42] setting is used for
forward rotation and the [Pr. 43] setting is used for
reverse rotation.
When outputting a frequency detection signal
besides the FU signal, set the detection frequency to
[Pr. 50] or [Pr. 116]. The FU2 (FB2) signal is output
when the output frequency reaches or exceeds the
[Pr. 50] setting (FU3 (FB3) signal is output when
reaches or exceeds the [Pr. 116] setting).
Forward
rotation
(Hz)
Output
signal
FU/FB OFF ON
FU2/FB2 OFF ON
FU3/FB3 OFF ON
*
,
*
)
common
can be used for
[Pr.116]
[Pr.50]
[Pr.42]
[Pr.43]
Time
[Pr.50]
[Pr.116]
Reverse
rotation
OFF ON OFF
OFF ON OFF
OFF ON OFF
Refer to the table below to assign FU2, FU3, FB,
FB2, FB3 signal to [Pr. 190 to Pr. 196 Output terminal
function selection].
Output Signal
FB
FU2
FB2
FU3
FB3
71
SPECIFICATIONS
[Pr. 190 to Pr. 196] Setting
Positive logic Negative logic
41 141
5 105
42 142
6 106
43 143
1