Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Parameters
5 - 124
5.3.9
Avoiding motor overrunning
Motor overrunning due to excessive load torque or an error in the setting for the number of encoder
pulses can be avoided.
This is the overspeed detection frequency under encoder feedback control. (Refer to page 5-730.)
These parameters are available when a vector control compatible option is installed.
The setting is available when the FR-A8AP or the FR-A8TP is installed.
Speed deviation excess detection (Pr. 285, Pr. 853)
●
A trip can be set for when the deviation between the set frequency and actual rotation speed is
large, such as when the load torque is excessive.
●
When the difference (absolute value) between the speed command value and actual rotation
speed in speed control under vector control is equal to higher than the setting value in Pr. 285
"Speed deviation excess detection frequency" for a continuous time equal to or longer than the
setting value in Pr. 853 "Speed deviation time", Speed deviation excess detection (E.OSD) activates
to shut off the inverter output.
Pr.
Name
Initial
value
Setting
range
Description
285
H416
Speed deviation
excess detection
frequency
9999
0 to 30 Hz
Set the speed deviation excess detection frequency
(difference between the actual rotation speed and
speed command value) at which the protective function
(E.OSD) activates.
9999
No speed deviation excess
853
H417
Speed deviation time
1s
0 to 100 s
Set the time from when the speed deviation excess
state is entered to when the protective function (E.OSD)
activates.
873
H415
Speed limit
20 Hz
0 to 400 Hz
Set the frequency limit with the set fre Pr. 873
value.
690
H881
Deceleration check
time
1 s
0 to 3600 s
Set the time required to shut off output due to
deceleration check after the start signal is OFF.
9999
No deceleration check
Fig. 5-33:
Speed deviation excess detection
I001518E
Vector
Vector
Vector
Fr
equen
cy [H
z]
Fault output
(ALM)
Set frequency
Actual speed
Time
Pr. 853
Pr. 285
OFF
ON
Speed deviation
excessive fault
activated (E. OSD)
Summary of Contents for FR-A820-00046 (0.4K)
Page 2: ......
Page 4: ......
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 ...
Page 1193: ...Appendix EC Declarations of Conformity FR A800 A 53 ...
Page 1194: ...EC Declarations of Conformity Appendix A 54 ...
Page 1195: ...Appendix EC Declarations of Conformity FR A800 A 55 ...
Page 1196: ...EC Declarations of Conformity Appendix A 56 ...
Page 1197: ...Appendix EC Declarations of Conformity FR A800 A 57 ...
Page 1198: ...EC Declarations of Conformity Appendix A 58 ...
Page 1199: ...Appendix EC Declarations of Conformity FR A800 A 59 ...
Page 1200: ...EC Declarations of Conformity Appendix A 60 ...
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Page 1202: ...EC Declarations of Conformity Appendix A 62 ...
Page 1203: ...Appendix EC Declarations of Conformity FR A800 A 63 ...
Page 1204: ...EC Declarations of Conformity Appendix A 64 ...
Page 1205: ...Appendix EC Declarations of Conformity FR A800 A 65 ...
Page 1206: ...EC Declarations of Conformity Appendix A 66 ...
Page 1207: ...Appendix EC Declarations of Conformity FR A800 A 67 ...
Page 1208: ...EC Declarations of Conformity Appendix A 68 ...
Page 1209: ...Appendix EC Declarations of Conformity FR A800 A 69 ...
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 ...
Page 1215: ...Appendix EC Declarations of Conformity FR A800 A 75 ...
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