Mitsubishi Electric FR-A700 Series, Техническое руководство

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315
PARAMETER
2
P
ARAM
ETE
R
(4) Selection of clear signal (CLR signal) [Pr.
429]
Use this function to make a drooping pulse 0 for
home position operation, etc.
When [
Pr. 429 = 0], the deviation counter is cleared at
the edge of turning ON of the clear signal (CLR). The
CLR signal turns ON in synchronization with the zero
pulse signal of encoder for home position operation,
etc. and clears the deviation counter.
When [
Pr. 429 = 1] (initial value), the deviation
counter is cleared while the clear signal (CLR) in ON.
For the terminal used for CLR signal input, set 69 in
any of [
Pr. 178 to Pr. 189 Input terminal function
selection ] to assign the function.
(5) Pulse monitor selection [Pr. 430]
The status of various pulses during running are
displayed.
Set [
Pr. 52 DU/PU main display data selection = 6] to
display output frequency monitor.
Count the number of pulses when the servo is ON.
The cumulative pulse value is cleared when the base
is shut off or the clear signal (CLR) is turned ON.
2.11.5 Setting the electronic gear [Pr. 420, 421, 424]
(A700)
Set the ratio of the machine side gear and the motor side gear.
(1) Calculation of the gear ratio [Pr. 420, 421]
The position resolution (travel per pulse [mm]) is
determined by the travel per motor revolution [mm]
and the feedback pulses Pf [pulse/rev] of the detector,
and is represented by the following expression.
:travel per pulse [mm]
s :1[mm]
Pf :number of feedback pulses [pulse/rev]
(number of pulses after multiplying the number
of encoder pulses by four)
Deviation counter
image
CLR
ON
When [ Pr. 429 = 0]
When [ Pr. 429 = 1] (initial value)
Deviation counter
image
CLR
ON
Counter clear while ON
Counter clear at the edge of
turning ON of the signal
[Pr. 430]
setting
Description
Display Range
FR-DU07
FR-PU04
FR-PU07
0 The cumulative
command pulse value is
displayed.
Lower 4
digits Lower 5
digits
1
Upper 4
digits Upper 5
digits
2
The cumulative feedback
pulse value is displayed.
Lower 4
digits Lower 5
digits
3
Upper 4
digits Upper 5
digits
4
The droop pulses are
displayed.
Lower 4
digits Lower 5
digits
5
Upper 4
digits Upper 5
digits
9999 Frequency monitor is displayed. (initial value)
[Pr. ] Name
Initial
Value Setting
Range
Description
420
Command pulse scaling factor
numerator
1 0 to 32767
*
Set the electric gear.
[
Pr. 420 ] is a numerator and [ Pr. 421 ] is a denominator.
421
Command pulse scaling factor
denominator
1 0 to 32767
*
424
Position command acceleration/
deceleration time constant
0s 0 to 50s
Used when rotation is not smooth at a large electronic gear
ratio (about 10 times or more) and low speed.
* When the operation panel (FR-DU07) is used, the maximum setting is 9999. When a parameter unit is used, up to the maximum
value within the setting range can be set.
A700
=
s
Pf