Mitsubishi Electric FR-F740 EC Instruction Manual page 278

Function assignment of external terminals
Output frequency detection (FU, FU2, Pr. 42, Pr. 43, Pr. 50)
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 sig-
nal, etc.
When the detection frequency is set in Pr. 43, frequency detection for reverse operation use only
can also be set. This function is effective for switching the timing of electromagnetic brake op-
eration between forward rotation (rise) and reverse rotation (fall) during vertical lift operation,
etc. When Pr. 43 "Output frequency detection for reverse rotation" ≠ 9999, the Pr. 42 setting ap-
plies to forward rotation and the Pr. 43 setting applies to reverse rotation.
When outputting a frequency detection signal besides the FU signal, set the detection frequency
to Pr. 50. The FU2 signal is output when the output frequency reaches or exceeds the Pr. 50 set-
ting. For each signal, assign functions to Pr. 190 to Pr. 196 "Output terminal function selection"
referring to the table below.
Pr. No.
42, 43
50
Fig. 6-68:
6 - 128
FU
FU2
Pr. 190–196 Setting
Output
Signals
Source logic
FU 4
FU2 5
Frequency detection for forward and reverse rotation
Forward
Pr. 50
rotation
Pr. 42
ON
ON
Sink logic
104
105
Parameter
Time
Pr. 43
Reverse
rotation
Pr. 50
ON
ON
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