sh030051g.pdf - 第169页
7 - 12 7. SPECIAL ADJUSTMENT FUNCTIONS 7.6.3 Parameters When using the gain changing function, always set " 3 " in parameter No.PA08 (auto tuning) to choose the manual mode of the gain adjustment modes. The gai…
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7. SPECIAL ADJUSTMENT FUNCTIONS
7.6.2 Function block diagram
The valid loop gains PG2, VG2, VIC and GD2 of the actual loop are changed according to the conditions
selected by gain changing selection CDP (parameter No.PB26) and gain changing condition CDS (parameter
No.PB27).
GD2
Parameter No.PB06
GD2B
Parameter No.PB29
PG2
Parameter No.PB08
PG2B
Parameter No.PB30
VG2
Parameter No.PB09
VG2B
Parameter No.PB31
VIC
Parameter No.PB10
VICB
Parameter No.PB32
CDS
Parameter No.PB27
VRF1
Parameter No.PB19
VRF1B
Parameter No.PB33
VRF2
Parameter No.PB20
VRF2B
Parameter No.PB34
Command pulse
frequency
Droop pulses
Model speed
Control
command of
controller
Comparator
Changing
Valid
GD2 value
Valid
PG2 value
Valid
VG2 value
Valid
VIC value
Valid
VRF1 value
Valid
VRF2 value
CDP
Parameter No.PB26
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7. SPECIAL ADJUSTMENT FUNCTIONS
7.6.3 Parameters
When using the gain changing function, always set "
3" in parameter No.PA08 (auto tuning) to choose the
manual mode of the gain adjustment modes. The gain changing function cannot be used in the auto tuning
mode.
Parameter No. Abbreviation Name Unit Description
PB06 GD2
Ratio of load inertia moment to
servo motor inertia moment
Multi-
plier
(
1)
Control parameters before changing
PB07 PG1 Model loop gain rad/s
Position and speed gains of a model used to set the
response level to a command. Always valid.
PB08 PG2 Position loop gain rad/s
PB09 VG2 Speed loop gain rad/s
PB10 VIC Speed integral compensation ms
PB29 GD2B
Gain changing ratio of load inertia
moment to servo motor inertia
moment
Multi-
plier
(
1)
Used to set the ratio of load inertia moment to servo motor
inertia moment after changing.
PB30 PG2B Gain changing position loop gain 2 rad/s
Used to set the value of the after-changing position loop
gain 2.
PB31 VG2B Gain changing speed loop gain 2 rad/s
Used to set the value of the after-changing speed loop
gain.
PB32 VICB
Gain changing speed integral
compensation
ms
Used to set the value of the after-changing speed integral
compensation.
PB26 CDP Gain changing selection Used to select the changing condition.
PB27 CDS Gain changing condition
kpps
pulse
r/min
Used to set the changing condition values.
PB28 CDT Gain changing time constant ms
You can set the filter time constant for a gain change at
changing.
PB33 VRF1B
Gain changing vibration suppression
control vibration frequency setting
Hz
Used to set the value of the after-changing vibration
suppression control vibration frequency setting.
PB34 VRF2B
Gain changing vibration suppression
control resonance frequency setting
Hz
Used to set the value of the after-changing vibration
suppression control resonance frequency setting.
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7. SPECIAL ADJUSTMENT FUNCTIONS
(1) Parameters No.PB06 to PB10
These parameters are the same as in ordinary manual adjustment. Gain changing allows the values of
ratio of load inertia moment to servo motor inertia moment, position loop gain, speed loop gain and speed
integral compensation to be changed.
(2) Gain changing ratio of load inertia moment to servo motor inertia moment (GD2B: parameter No.PB29)
Set the ratio of load inertia moment to servo motor inertia moment after changing. If the load inertia moment
ratio does not change, set it to the same value as ratio of load inertia moment to servo motor inertia moment
(parameter No.PB06).
(3) Gain changing position loop gain (parameter No.PB30), Gain changing speed loop gain (parameter
No.PB31), Gain changing speed integral compensation (parameter No.PB32)
Set the values of after-changing position loop gain, speed loop gain and speed integral compensation.
(4) Gain changing selection (parameter No.PB26)
Used to set the gain changing condition. Choose the changing condition in the first digit and second digit. If
you set "1" in the first digit here, you can use the control command from controller is valid for gain changing.
Gain changing selection
Under any of the following conditions, the gains
change on the basis of the parameter No.PB29 to
PB32 settings.
0: Invalid
1: Control command from controller is valid
2: Command frequency (Parameter No.PB27 setting)
3: Droop pulse value (Parameter No.PB27 setting)
4: Servo motor speed (Parameter No.PB27 setting)
00
Gain changing condition
0: Valid at more than condition (Valid with ON for control command from controller.)
1: Valid at less than condition (Valid with OFF for control command from controller.)
(5) Gain changing condition (parameter No.PB27)
When you selected "command frequency", "droop pulses" or "servo motor speed" in gain changing
selection (parameter No.PB26), set the gain changing level.
The setting unit is as follows.
Gain changing condition Unit
Command frequency kpps
Droop pulses pulse
Servo motor speed r/min
(6) Gain changing time constant (parameter No.PB28)
You can set the primary delay filter to each gain at gain changing. This parameter is used to suppress
shock given to the machine if the gain difference is large at gain changing, for example.