141 
Adaptive large inertia mode speed loop 
gain   
Adaptive large inertia mode inertia ratio   
Adaptive large inertia mode speed 
observer gain   
Adaptive large inertia mode max inertia 
ratio   
Note 1: DS5 series servo 750W and below driver default value is 400; other power section default 
value is 200. 
Note 2: DS5 series servo 400W and below driver default value is 70; other power section default value 
is 50. 
 
6.6.5 Recommended inertia ratio parameters 
Under the adaptive default parameters, the load can only run steadily under a certain moment of inertia. 
If the load inertia is large, some parameters need to be adjusted. The recommended parameters are as 
follows (the parameters are modified under the default parameters). 
 
Adaptive small inertia mode (default parameters)   
Set P2-08=50, P2-12=40, P2-07=10 
Set P2-08=50, P2-12=40, P2-07=30 
Switch  to  adaptive  large  inertia  mode  or  set  P2-08=40, 
P2-12=50, P2-07=50 
Adaptive small inertia mode (default parameters)   
Switch  to  adaptive  large  inertia  mode  or  set  P2-08=40, 
P2-12=50, P2-07=50 
Adaptive small inertia mode (default parameters)   
Switch  to  adaptive  large  inertia  mode  or  set  P2-08=40, 
P2-12=50, P2-07=50 
Note:  The  large  inertia  parameters  can  still  drive  a  smaller  inertia  load.  For  example,  when  the 
parameters of 50 times inertia are used in the mechanism of 20 times inertia, only the response will 
become worse. 
6.6.6 Adaptive parameters effect 
Small 
inertia/large 
inertia 
Reduction can improve the inertia 
capability, but it will reduce the 
responsiveness, which has a greater 
impact on the responsiveness. 
Adaptive  load 
inertia ratio   
Increase can greatly improve the inertia 
capacity without affecting the 
responsiveness. Too large will produce 
vibration.