Detection Of Output Frequency (Su, Fu, Fu2 , Fu3, Ls Signal, Pr. 41 To Pr. 43, Pr. 50, Pr. 116, Pr. 865); Detection Of Output Frequency - Mitsubishi Electric FR-B-750 to 75K Instruction Manual

Function assignment of external terminal and control

4.11.6 Detection of output frequency

(SU, FU, FU2 , FU3, 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
* The setting range differs according to the inverter capacity. (22K or less/30K or more)
Running frequency
OFF
ON
SU
(2) Output frequency detection (FU signal, FU2 signal, FU3 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) 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.
⋅ 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 signal (FU3 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 OFF
FU2 OFF
FU3 OFF
130
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
ON OFF
ON OFF
ON OFF
Setting Range
FR-B FR-B3
0 to 100% Set the level where the SU signal turns on.
0 to 120Hz/ 0 to Set the frequency where the FU (FB) signal turns
0 to 60Hz 120Hz on.
*
0 to 120Hz/ 0 to Set the frequency where the FU (FB) signal turns
0 to 60Hz 120Hz on in reverse rotation.
*
9999 Same as Pr. 42 setting
0 to 120Hz/ 0 to Set the frequency where the FU2 (FB2) signal
0 to 60Hz 120Hz turns on.
*
0 to 120Hz/ 0 to Set the frequency where the FU3 (FB3) signal
0 to 60Hz 120Hz turns on.
*
0 to 120Hz/ 0 to
Set the frequency where the LS signal turns on.
0 to 60Hz 120Hz
*
Pr.43
Time
Pr.50
Pr.116
ON OFF
ON OFF
ON OFF
Description
Pr. 190 to Pr. 196
Parameter Output
Number Signal
Positive
logic
42, 43 FU 4
50 FU2 5
116 FU3 6
Setting
Negative
logic
104
105
106