Detection Of Output Frequency (Su, Fu Signal, Pr. 41 To Pr. 43) - Mitsubishi Electric FR-E740-016 Instruction Manual
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Function assignment of external terminal and control
4.11.6 Detection of output frequency (SU, FU signal, Pr. 41 to Pr. 43)
The inverter output frequency is detected and output at the output signals.
Parameter
Name
Number
Up-to-frequency
41
sensitivity
Output frequency
42
detection
Output frequency
43
detection for reverse
rotation
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 177)
Set frequency
OFF
SU
Forward
rotation
Output signal
OFF
ON
FU
REMARKS
The FU signal is assigned to the terminal FU in the initial setting. The FU signal can also be assigned to the other terminal by
setting "4 (positive logic) or 104 (negative logic)" in any of Pr. 190 to Pr. 192 .
All signals are off during DC injection brake.
The output frequency to be compared with the set frequency is the output frequency before slip compensation is performed.
NOTE
Changing the terminal assignment using Pr.190 to Pr.192 (output terminal function selection) may affect the other
functions. Make setting after confirming the function of each terminal.
Parameters referred to
Pr. 190 to Pr. 192 (output terminal function selection)
138
Initial Value
10%
6Hz
9999
Adjustment
range Pr.41
Time
ON
OFF
Pr.42
Reverse
rotation
OFF
OFF
ON
Setting Range
0 to 100%
Level where the SU signal turns on.
0 to 400Hz
Frequency where the FU signal turns on.
Frequency where the FU signal turns on in reverse
0 to 400Hz
rotation.
9999
Same as Pr. 42 setting
(1)
Up-to-frequency sensitivity (SU signal, Pr. 41)
When the output frequency reaches the set frequency, the
up-to-frequency signal (SU) is output.
The Pr. 41 value can be adjusted within the range 0% to
±100% on the assumption that the set frequency is 100%.
This parameter can be used to ensure that the running
frequency has been reached to provide the operation start
signal etc. for related equipment.
When using the SU signal, set "1 (positive logic) or 101
(negative logic)" in Pr. 190 to Pr. 192 (output terminal function
selection) to assign function to the output terminal.
(2)
Output frequency detection
(FU signal, Pr. 42, Pr. 43)
The output frequency detection signal (FU) is output when
the output frequency reaches or exceeds the Pr. 42 setting.
Time
This function can be used for electromagnetic brake
Pr.43
operation, open signal, etc.
When the detection frequency is set to Pr. 43, frequency
detection for reverse operation use only 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.
(
Refer to page 134)
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