Position Adjustment Parameter Settings - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
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.
Parameters referred to
Pr. 422
5.5.8

Position adjustment parameter settings

Pr.
426
B007
427
B008
1294
B192
1295
B193
1295
B193
1297
B195
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.
FR-A800
Position control under vector control and PM sensorless vector control
Position control gain
Name
In-position width 100 pulses 0 to 32767 pulses
Excessive level error
Position detection lower 4
digits
Position detection upper 4
digits
Position detection
selection
Position detection
hysteresis width
Vector Vector Vector
Initial
Setting range
value
0 to 400 x 10³
40 x 10³
9999
0 0 to 9999
0 0 to 9999
0
0
1
2
0 0 to 32767
=> page 5-189
PM PM PM
Description
Set the number of droop pulses that triggers the
In-position (Y36) signal.
Set the number droop pulses that activates
Excessive position fault (E.OD).
Function invalid
Set the lower four digits of the position detection
value.
Set the upper four digits of the position
detection value.
The position is detected on both the plus side
and minus sides.
The position is detected on the plus side only.
The position is detected on the minus side only.
Set the hysteresis width for the detection
position of the position detected signal (FP
signal).
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