Mitsubishi Electric FR-F800 Series Instruction Manual page 338

 Changing the special relay function for the PLC function
• For the PLC function, the function of special relays (SM1225 to SM1234) can be changed by setting Pr.313 to Pr.322. (For
details on the PLC function, refer to the PLC Function Programming Manual.)
Parameters referred to
Pr.13 Starting frequencypage
Pr.76 Fault code output
5.8.7
If the inverter output frequency which reaches a specific value is detected, the relative signal is output.
Pr.
41 Up-to-frequency
M441 sensitivity
42 Output frequency
M442 detection
Output frequency
43
detection for reverse
M443
rotation
50 Second output
M444 frequency detection
870 Speed detection
M400 hysteresis
 Setting the notification zone of the output frequency reaching the set
point (SU signal, Pr.41)
• The Up to frequency (SU) signal is output when the output frequency reaches the set frequency.
• Set the value in the range of ±1% to ±100% in Pr.41 to determine tolerance for the set frequency (considered as 100%
point).
• It may be useful to use this signal to start operating related equipment after checking that the set frequency has been
reached.
Set frequency
OFF
SU
 Output frequency detection (FU (FB) signal, FU (FB2) signal, Pr.42, Pr.43,
Pr.50)
• The Output frequency detection (FU/FU2) signal or the Speed detection (FB/FB2) signal is useful for applying or releasing
electromagnetic brake, etc.
• The FU signal is output when the output frequency (frequency command value) reaches or exceeds the Pr.42 setting.
• During PM motor control, the FB signal is output when the estimated actual motor rotations per minute reaches the Pr.42
setting. Under V/F control and Advanced magnetic flux vector control, the FU signal and the FB signal are output at the
same time.
• The frequency detection dedicated to motor rotation in reverse direction is enabled by setting the frequency in Pr.43.
• When Pr.43 ≠ "9999", the Pr.42 setting is for the forward rotation operation and the Pr.43 setting is for the reverse rotation
operation.
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Output frequency detection
Initial value
Name
FM
10%
6 Hz
9999
30 Hz
0 Hz
Adjustment
range Pr.41
Time
OFF
ON
search engine
Setting
range
CA
0% to 100% Set the level where the SU signal turns ON.
0 to 590 Hz Set the frequency at which the FU (or FB) signal turns ON.
Set the frequency at which the FU (or FB) signal turns ON only
0 to 590 Hz
while the motor rotates in reverse direction.
9999 The frequency same as the Pr.42 setting is set.
0 to 590 Hz Set the frequency at which the FU2 (or FB2) signal turns ON.
0 to 5 Hz Set the hysteresis width for the detected frequency.
Description
5. PARAMETERS
5.8 (M) Item and output signal for monitoring
1
2
3
4
5
6
7
8
9
10
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