302
12. (M) Item and Output Signal for Monitoring
12.7 Output frequency detection
• 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.
• To use each signal, set the corresponding number selected from the following table in any parameter from
Pr.190 to
Pr.196 (Output terminal function selection)
to assign the function to an output terminal.
Low speed detection (LS signal, Pr.865)
• When the output frequency drops to the setting of
Pr.865 Low speed detection
or lower, the Low speed detection (LS)
signal is output.
• The fault "E.OLT" displays and the inverter output shuts off if the torque limit operation causes the frequency to drop to the
frequency set in
Pr.865
and the output torque to surpass the value set in
Pr.874 OLT level setting
for three seconds or
longer in the speed control mode under Real sensorless vector control or PM sensorless vector control.
• To use the LS signal, set "34" (positive logic) or "134" (negative logic) in any parameter from
Pr.190 to Pr.196 (Output
terminal function selection)
to assign the function to the output terminal.
Speed detection hysteresis (Pr.870)
Setting the hysteresis width for the detected frequency prevents chattering of the Speed detection (FB) signal. When an output
frequency fluctuates, the following signals may chatter (turns ON and OFF repeatedly).
• Up to frequency (SU) signal
• Speed detection (FB) signal
• Low speed detection (LS) signal
Setting hysteresis to the detected frequency prevents chattering of these signals.
Forward
rotation
Time
(Hz)
Output
signal
Output frequency
Reverse
rotation
Pr.42
Pr.43
OFF
ON
OFF
ON
OFF
FU/FB
Output signal
Pr.190 to Pr.196 settings
Related Parameter
Positive logic
Negative logic
FU
4
104
42, 43
FB
41
141
Time
ON
LS
ON
OFF
Pr.865
Output frequency
(Hz)
Output
frequency
(Hz)
Example of the speed detection (FB) signal
Pr.870
Pr.42
ON
ON
ON
FB
Pr.870
Pr.870
Pr.870
Pr.870
Pr.41
ON
ON
ON
SU signal
SU output level
SU output level
Output frequency
(Hz)
Set frequency
Time
Example of the up to frequency (SU) signal
Summary of Contents for FR-E800
Page 17: ...16 1 Introduction 1 3 Related manuals MEMO ...
Page 51: ...50 2 Basic Operation 2 8 I O terminal function assignment MEMO ...
Page 89: ...88 3 Parameters 3 4 Parameter list by function group number MEMO ...
Page 135: ...134 5 Speed Control 5 9 Troubleshooting in the speed control MEMO ...
Page 153: ...152 6 Torque Control 6 7 Troubleshooting in torque control MEMO ...
Page 195: ...194 8 E Environment Setting Parameters 8 18 Current average value monitor signal MEMO ...
Page 237: ...236 10 D Operation Command and Frequency Command 10 6 Operation by multi speed setting MEMO ...
Page 339: ...338 13 T Multi Function Input Terminal Parameters 13 9 Start signal operation selection MEMO ...
Page 455: ...454 16 G Control Parameters 16 13 Speed smoothing control MEMO ...
