8-64
8-7 Special Parameters
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
8
Parameters Details
Set the time constant of FIR filter for the position command.
The Position command FIR filter can be selected to enable or disable, by the position command
filer switch input via MECHATROLINK-II communications.
It sets the time to arrive at the target speed Vc, as shown below, for the square-wave command
of Vc.
*1. Change the setting on Pn818 only after you stop the command pulse and the filter switching dwell
time elapses. The dwell time is calculated by the following formulas depending on the value set on
Pn818.
If Pn818 set value
10 ms, the set value
0.1 ms + 0.25 ms.
If Pn818 set value
10 ms, the set value
0.1 ms
1.05.
Precautions for Correct Use
If the set value on Pn818 is changed during the position command is entered, the change is not
reflected immediately. It is updated only after the subsequent state of no position command
persists for the filter switching dwell time.
There is some time lag from when the Pn818 is change and to when the change is applied. If the
filter switching dwell time elapses during the lag, the change may be suspended.
Sets the distance to travel after the latch signal input position is detected during the external input
positioning.
Pn818
Position Command FIR Filter Time Constant
Setting range
0 to 10000
Unit
0.1 ms
Default setting
0
Data Attribute
B
Position Full closing
Speed [r/min]
Vc
Pre-filter
position command
Post-filter
position command
Position Command FIR Filter
Time Constant [ms]
Pn818
×
0.1 ms
Filter switching
dwell time
*1
Pn819
Unused
Setting range
Unit
Default setting
Data Attribute
All
Pn820
Final Distance for External Input Positioning
Setting range
1073741823 to
1073741823
Unit
0.1 ms
Default setting
100
Data Attribute
B
Position Full closing
Pn821
Unused
Setting range
Unit
Default setting
Data Attribute
All
