Parameters
(H) Protective function parameter
FR-A800
5 - 339
5.10.13
Motor overspeeding detection
The Overspeed occurrence (E.OS) is activated when the motor speed exceeds the overspeed detec-
tion level. This function prevents the motor from accidentally speeding over the specified value, due
to an error in parameter setting, etc.
The motor maximum frequency is set in Pr. 702 "Maximum motor frequency." When Pr. 702 = "9999
(initial value)", the Pr. 84 "Rated motor frequency" setting is applied as the motor maximum
frequency.
Pr.
Name
Initial
value
Setting
range
Description
374
H800
Overspeed detection level
9999
0 to 590 Hz
If the motor rotation speed exceeds the speed set in
Pr. 374 during encoder feedback control, Real
sensorless vector control, vector control or PM
sensorless vector control, Overspeed occurrence (E.OS)
occurs, the inverter output is shut off.
9999
If the speed exceeds "the maximum speed (Pr. 1, Pr. 18)
+ 20 Hz" during encoder feedback control, Real
sensorless vector control, or vector control, E.OS
occurs.
During PM sensorless vector control, E.OS occurs when
the speed exceeds "the motor maximum fre
10 Hz"
Fig. 5-149:
Overspeed detection level and alarm occurrence
I002601E
NOTE
During encoder feedback control and vector control, the motor speed is compared against Pr. 374.
During Real sensorless vector control and PM sensorless vector control, the output frequency is
compared against Pr. 374.
ALM
E.OS
Motor speed
Pr. 374
Coast to stop
ON
Time
Summary of Contents for FR-A820-00046 (0.4K)
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Page 144: ...System configuration for Ethernet communication FR A800 E Installation and wiring 2 114 ...
Page 202: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 1090: ...Check first when you have a trouble Protective functions 6 50 ...
Page 1189: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1190: ...EC Declarations of Conformity Appendix A 50 ...
Page 1191: ...Appendix EC Declarations of Conformity FR A800 A 51 ...
Page 1192: ...EC Declarations of Conformity Appendix A 52 ...
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Page 1194: ...EC Declarations of Conformity Appendix A 54 ...
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Page 1196: ...EC Declarations of Conformity Appendix A 56 ...
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Page 1198: ...EC Declarations of Conformity Appendix A 58 ...
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Page 1202: ...EC Declarations of Conformity Appendix A 62 ...
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Page 1204: ...EC Declarations of Conformity Appendix A 64 ...
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Page 1206: ...EC Declarations of Conformity Appendix A 66 ...
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Page 1208: ...EC Declarations of Conformity Appendix A 68 ...
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Page 1210: ...EC Declarations of Conformity Appendix A 70 ...
Page 1211: ...Appendix EC Declarations of Conformity FR A800 A 71 ...
Page 1212: ...EC Declarations of Conformity Appendix A 72 A 7 2 FR A846 series ...
Page 1213: ...Appendix EC Declarations of Conformity FR A800 A 73 ...
Page 1214: ...EC Declarations of Conformity Appendix A 74 ...
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