Mitsubishi Electric FR-A700 Series Instruction Manual page 124

Parameter
Name
Encoder rotation
359
direction
Speed feedback
367
range
368
Feedback gain
Number of encoder
369
pulses
Overspeed detec-
374
tion level
Open cable detec-
376
tion enable/disable
selection
380 to 383
Refer to Pr. 29.
—
384 to 386
Refer to Pr. 291.
Position command
419
source selection
Command pulse
420
scaling factor
numerator
Command pulse
421
scaling factor
denominator
422
Position loop gain
Position feed for-
423
ward gain
Position command
acceleration/decel-
424
eration time con-
stant
Position feed for-
425
ward command fil-
ter
Incre Initial
Range
ments Value
0
1 1
1
0 to 400Hz Set the region of speed feedback control.
0.01Hz 9999
9999 Encoder feedback control is invalid
Set when the rotation is unstable or
0.1 1 0 to 100
response is slow.
Set the number of pulses of the encoder.
1 1024 0 to 4096 Set the number of pulses before multiplied
by four.
When the motor speed reaches or exceeds
the speed set in Pr.374 during encoder feed-
0.01Hz 140Hz 0 to 400Hz back control, real sensorless vector control,
or vector control, over speed (E.OS) occurs
and stops the inverter output.
0 Signal loss detection is invalid
1 0
Signal loss detection is valid
When the cable of the encoder signal is
broken during encoder feedback control,
1
orientation control, or vector control, signal
loss detection (E.ECT) is activated to stop
the inverter output.
Conditional position control function by
0
contact input
1 0
Conditional position pulse train command
2
by pulse train input from the JOG terminal
1 1 0 to 32767
Set the electronic gear.
Pr. 420 is a numerator and Pr. 421 is a
denominator.
1 1 0 to 32767
-1 -1 -1
Set the gain of the position loop.
1s 25s 0 to 150s
Function to cancel a delay caused by the
1% 0% 0 to 100%
droop pulses of the deviation counter.
Used when rotation has become unsmooth
0.001s 0s 0 to 50s at a large electronic gear ratio (about 10
times or more) and low speed.
Enters the primary delay filter in response
0.001s 0s 0 to 5s
to the feed forward command.
Description
CW
A
Encoder
Clockwise direction as viewed
from A is forward rotation
CW
A
Encoder
Clockwise direction as viewed
from A is forward rotation
Parameter List
All
Param Param
param
eter eter
eter
copy clear
clear
: enabled
× : disabled
3
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