7. SPECIAL ADJUSTMENT FUNCTIONS
7 - 17
7.2.3 Parameter
When using the gain switching function, always select "Manual mode (_ _ _ 3)" of "Gain adjustment mode
selection" in [Pr. PA08 Auto tuning mode]. The gain switching function cannot be used in the auto tuning
mode.
(1) Variable gain operation setting parameter
Parameter Symbol Name Unit Description
PB26 CDP Gain switching selection Used to select the changing condition.
PB27 CDL Gain switching condition [kpulse/s]
/[pulse]
/[r/min]
Used to set the changing condition values.
PB28 CDT Gain switching time constant [ms] You can set the filter time constant for a gain change at
changing.
(a) [Pr. PB26 Gain switching function]
Used to set the gain switching condition. Select the switching condition in the first digit and second
digit.
Gain switching selection
0: Disabled
1: Input device (gain switching (CDP))
2: Command frequency
3: Droop pulses
4: Servo motor speed
00
Gain switching condition
0: Gain after switching is enabled with gain switching condition or more
1: Gain after switching is enabled with gain switching condition or less
[Pr. PB26]
(b) [Pr. PB27 Gain switching condition]
Set a level to switch gains after you select "Command frequency", "Droop pulses", or "Servo motor
speed" in [Pr. PB26 Gain switching function].
The setting unit is as follows.
Gain switching condition Unit
Command frequency [kpulse/s]
Droop pulses [pulse]
Servo motor speed [r/min]
(c) [Pr. PB28 Gain switching time constant]
You can set the primary delay filter to each gain at gain switching. This parameter is used to
suppress shock given to the machine if the gain difference is large at gain switching, for example.
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