Parameters
Position control under vector control and PM sensorless vector control
FR-A800
5 - 187
Position command constant value during acceleration/deceleration (Pr. 424)
●
If the electronic gear ratio is large (1:10 or larger) and the rotation speed is slow, the rotation is
not smooth and the rotation shape becomes like a pulse. Set this option in such a case to
smoothen the rotation.
●
If the command pulse frequency varies rapidly when no acceleration time can be assigned to the
command pulse, overshoot or excessive error alarms may occur. Set this option in such a case to
set the acceleration/deceleration time.
Normally it is set to 0.
5.5.8 Position
adjustment parameter settings
In-position width (Pr. 426, Y36 signal)
●
The Y36 signal is used as the in-position signal.
●
If the number of droop pulses is equal to or smaller than the Pr. 426 setting value, the In-position
(Y36) signal is turned ON.
●
To use the Y36 signal, set "36 (positive logic) or 136 (negative logic)" in any of Pr. 190 to Pr. 196
(output terminal function selection) to assign the function.
Excessive error level (Pr. 427)
●
If the number of droop pulses exceeds the Pr. 427 setting, a position error is detected, Excessive
position fault (E.OD) is activated and the inverter output is shut off. Increase the error threshold
level when a small value is set as the Position control gain setting value. Set a small value for early
detection even when the load is heavy.
●
If Pr. 427 = "9999" is set, E.OD is not activated regardless of the amount of droop pulses.
Parameters referred to
Pr. 422
Position control gain
=>
Pr.
Name
Initial
value
Setting range
Description
426
B007
In-position width
100 pulses
0 to 32767 pulses
Set the number of droop pulses that triggers the
In-position (Y36) signal.
427
B008
Excessive level error
40 x 10³
0 to 400 x 10³
Set the number droop pulses that activates
Excessive position fault (E.OD).
9999
Function invalid
1294
B192
Position detection lower 4
digits
0
0 to 9999
Set the lower four digits of the position detection
value.
1295
B193
Position detection upper 4
digits
0
0 to 9999
Set the upper four digits of the position
detection value.
1295
B193
Position detection
selection
0
0
The position is detected on both the plus side
and minus sides.
1
The position is detected on the plus side only.
2
The position is detected on the minus side only.
1297
B195
Position detection
hysteresis width
0
0 to 32767
Set the hysteresis width for the detection
position of the position detected signal (FP
signal).
Vector
Vector
Vector
PM
PM
PM
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 ...
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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 ...
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