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8. Setup 
 
 
 
 
 
8 - 13
8-3  List of parameters 
 
No. Abbrev. Parameter 
name 
Explanation 
Setting 
range (Unit)
SV001 
PC1* 
Motor side gear ratio 
1 to 32767
SV002 PC2* 
Machine side gear 
ratio 
Set the motor side and machine side gear ratio. 
For the rotary axis, set the total deceleration (acceleration) ratio. 
Even if the gear ratio is within the setting range, the electronic gears may 
overflow and cause initial parameter error (servo alarm No. 37). 
1 to 32767
SV003 PGN1 Position 
loop gain 1 
Set the position loop gain. The standard setting is "33". 
The higher the setting value is, the more precisely the command can be 
followed and the shorter the positioning time gets, however, note that a 
bigger shock is applied to the machine during acceleration/deceleration. 
When using the SHG control, also set SV004 (PGN2) and SV057 (SHGC). 
1 to 200 
(rad/s) 
SV004 PGN2 Position 
loop gain 2 
When using the SHG control, also set SV003 (PGN1) and SV057 (SHGC). 
When not using the SHG control, set to "0". 
0 to 999 
(rad/s) 
SV005 VGN1 Speed loop gain 1 
Set the speed loop gain. 
Set this according to the load inertia size. 
The higher the setting value is, the more accurate the control will be, 
however, vibration tends to occur. 
If vibration occurs, adjust by lowering by 20 to 30%. 
The value should be determined to be 70 to 80% of the value at the time 
when the vibration stops. 
1 to 999 
 
   
 
   
 
   
VGN1
VGN2
 
   
VCS 
     VLMT 
SV006 VGN2 Speed loop gain 2 
If the noise is bothersome at high speed 
during rapid traverse, etc, lower the speed 
loop gain. 
As in the right figure, set the speed loop 
gain of the speed 1.2 times as fast as the 
motor's maximum speed, and use this with 
SV029 (VCS). 
When not using, set to "0".
 
0
 
(Maximum speed*1.2)
 
-1000 to 
1000 
SV007 VIL 
Speed loop delay   
compensation 
Set this when the limit cycle occurs in the full-closed loop, or overshooting 
occurs in positioning. 
When you set this parameter, make sure to set the torque offset (SV032 
(TOF)).    When not using, set to “0”. 
0 to 32767
SV008 VIA 
Speed loop lead 
compensation 
Set the gain of the speed loop integration control. 
The standard setting is "1364". During the SHG control, the standard 
setting is "1900". Adjust the value by increasing/decreasing it by about 100 
at a time. 
Raise this value to improve contour tracking precision in high-speed 
cutting. Lower this value when the position droop vibrates (10 to 20Hz). 
1 to 9999
SV009 IQA 
Current loop q axis 
lead compensation 
SV010 IDA 
Current loop d axis 
lead compensation 
Set the gain of current loop. 
As this setting is determined by the motor's electrical characteristics, the 
setting is fixed for each type of motor. 
Set the standard values for all the parameters depending on each motor 
type. 
1 to 20480
SV011 IQG 
Current loop q axis 
gain 
SV012 IDG 
Current loop d axis 
gain 
 
1 to 4096
SV013 
ILMT 
Current limit value 
Set the normal current (torque) limit value. (Limit values for both + and - 
direction.) 
When the value is "500" (a standard setting), the maximum torque is 
determined by the specification of the motor. 
0 to 999 
(Stall 
current %)
SV014 ILMTsp 
Current limit value in 
special control 
Set the current (torque) limit value in a special control (initial absolute 
position setting, stopper control, etc). (Limit values for both of the + and - 
directions.) 
Set to "500" when not using. 
0 to 999 
(Stall 
current %)
SV015 FFC 
Acceleration rate 
feed forward gain 
When a relative error in the synchronous control is large, apply this 
parameter to the axis that is delaying. The standard setting value is “0”.   
For the SHG control, set to "100". 
To adjust a relative error in acceleration/deceleration, increase the value by 
50 to 100 at a time. 
0 to 999 
(%) 
 
Parameters with an asterisk * in the abbreviation, such as PC1*, are validated with the NC power is turned ON again.