Detection Of Output Frequency (Su, Fu, Fu2 , Fu3, Fb, Fb2, Fb3, Ls Signal, Pr. 41 To Pr. 43, Pr. 50, Pr. 116, Pr. 865) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

4.15.6 Detection of output frequency (SU, FU, FU2 , FU3, FB, FB2, FB3, LS signal,
Pr. 41 to Pr. 43, Pr. 50, Pr. 116, Pr. 865)
The inverter output frequency is detected and output to the output signal.
Parameter
Name
Number
41 Up-to-frequency sensitivity
42 Output frequency detection
Output frequency detection
43
for reverse rotation
Second output frequency
50
detection
Third output frequency
116
detection
865 Low speed detection
Running frequency
OFF
ON
SU
(2) Output frequency detection (FU (FB) signal, FU2 (FB2) signal, FU3 (FB3) signal, Pr. 42, Pr. 43,
Pr. 50, Pr. 116)
⋅ When the output frequency rises to or above the Pr. 42 setting, the output frequency detection signal (FU, FB) is
output.
⋅ This function can be used for electromagnetic brake operation, open signal, etc.
⋅ The FU (FU2, FU3) signal is output when the output frequency reaches the set frequency. While the FB (FB2, FB3)
signal is output when the actual rotation detection speed (during real sensorless vector control : speed estimated
value, during vector control : feedback value) of the motor reaches the set frequency. 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 elevator operation, etc.
≠ "9999", the Pr. 42 setting applies to forward rotation and the Pr. 43 setting applies to reverse rotation.
⋅ When Pr. 43
⋅ When outputting a frequency detection signal besides the FU signal, set the detection frequency in Pr. 50 or Pr. 116. The
FU2 (FB2) signal (FU3(FB3) signal if Pr.116 or more) is output when the output frequency reaches or exceeds the Pr. 50
setting.
⋅ For each signal, assign functions to Pr. 190 to Pr. 196 (output terminal function selection) referring to the table below.
Forward
rotation
(Hz)
Output
signal
FU/FB OFF ON
FU2/FB2 OFF ON
FU3/FB3 OFF ON
Initial
Value
10%
6Hz
9999
30Hz
60Hz
1.5Hz
(1) Up-to-frequency sensitivity (SU signal, Pr. 41)
Adjustment
range Pr.41
⋅ When the output frequency reaches the running frequency, the up-to-
frequency signal (SU) is output.
⋅ The Pr. 41 value can be adjusted within the range ±1% to ±100% on the
assumption that the set frequency is 100%.
⋅ This parameter can be used to ensure that the running frequency has been
Time
reached to provide the operation start signal etc. for related equipment.
OFF
Pr.116
Pr.50
Pr.42
Reverse
rotation
OFF ON
OFF ON
OFF ON
Function assignment of external terminal and control
Setting
Range
0 to 100% Set the level where the SU signal turns on.
0 to 400Hz Set the frequency where the FU (FB) signal turns on.
Set the frequency where the FU (FB) signal turns on
0 to 400Hz
in reverse rotation.
9999 Same as Pr. 42 setting
Set the frequency where the FU2 (FB2) signal turns
0 to 400Hz
on.
Set the frequency where the FU3 (FB3) signal turns
0 to 400Hz
on.
0 to 400Hz Set the frequency where the LS signal turns on.
Parameter
Number
42, 43
Pr.43
Time
Pr.50
50
Pr.116
116
OFF
OFF
OFF
Description
Pr. 190 to Pr. 196
Setting
Output
Signal
Positive Negative
logic logic
FU 4 104
FB 41 141
FU2 5 105
FB2 42 142
FU3 6 106
FB3 43 143
235
Pr. 37
page 240
Pr. 44
page 168
Pr. 49
page 148
Pr. 51
page 176
Pr. 115
page 148
Pr. 117
page 314
Pr. 864
page 238
Pr. 866
page 247
4