Mitsubishi Electric M800 Series Manual page 538

M800/M80/E80/C80 Series Alarm/Parameter Manual
16 Machine Parameters
bit 1-0 : vcnt Speed loop delay compensation changeover type selection
Normally, use "Changeover type 2".
bit1,0=
00: Disable
01: Changeover type 1
10: Changeover type 2
11: Setting prohibited
Related parameters: SV007
(PR) #2228 SV028 MSFT
Set this parameter to adjust the motor magnetic pole position and encoder's installation phase when using
linear motors or direct-drive motors.
During the DC excitation of the initial setup (SV034/bit4=1), set the same value displayed in "AFLT gain" on
the NC monitor screen.
Related parameters: SV034/bit4, SV061, SV062, SV063
For general motor:
Not used. Set to "0".
---Setting range---
-18000 to 18000 (electrical angle 0.01°)
#2229 SV029 VCS
Noise at high speed rotation including rapid traverse can be reduced by lowering the speed loop gain at high
speeds.
Set the speed at which the speed loop gain changes. Use this with SV006 (VGN2).
When not using, set to "0".
---Setting range---
0 to 9999 (r/min)
#2230 SV030 IVC
When 100% is set, the voltage reduction amount equivalent to the logical non-energization in the PWM con-
trol will be compensated.
When "0" is set, 100% compensation will be performed.
Adjust in increments of 10% from the default value of 100%.
If increased too much, vibration or vibration noise may be generated.
---Setting range---
0 to 255 (%)
#2231 SV031 OVS1
This compensates the motor torque when overshooting occurs during positioning. This is valid only when the
overshooting compensation (SV027/bitB,A) is selected.
Type 3 SV027/bitB,A=11
Set the compensation amount based on the motor stall current. Observing positioning droop waveform,
increase in increments of 1% and find the value where overshooting does not occur.
To vary compensation amount depending on the direction.
When SV042 (OVS2) is "0", change the SV031 (OVS1) value in both of the +/- directions to compensate.
To vary the compensation amount depending on the command direction, set this and SV042 (OVS2).
(SV031: + direction, SV042: - direction. However, the directions may be opposite depending on other set-
tings.)
When "-1" is set, the compensation will not be performed in the direction of the command.
Related parameters: SV027/bitB,A, SV034/bitF-C, SV042, SV082/bit2
---Setting range---
-1 to 100 (Stall current %)
Note that the range will be "-1 - 10000" (Stall current 0.01%) when SV082/bit2 is "1".
Magnetic pole shift amount (for linear/direct-drive mo-
tor)
Speed at the change of speed loop gain
Voltage non-sensitive band compensation
Overshooting compensation 1
521 IB-1501279-H