5-71              
 
Step  Item  Formula  Description 
1 
Calculate the working Energy of 
the servo system. 
182/=
2
rmTM
ωJE  
M
E
: Working Energy of Servo system (J) 
T
J : Inertia applied to the motor shaft 
(
2
• mkg ) 
rm
ω : Motor running Speed(rpm) 
2 
Calculate the Energy 
consumption by the load during 
deceleration.  
DLrmL
tTωπE )60/(=  
L
E
: The Energy during deceleration (J) 
L
T : Loading Torque(Nm) 
D
t : The Time from deceleration to stopping(s)
3 
Calculate the Energy absorbed by 
internal  main capacitor.  
C
E Check the diagram above
C
E : The Energy absorbed by the main 
capacitor  (J) 
4 
Calculate the Energy which 
regeneration resistor consumes  
)+(-=
CLMR
EEEE  
R
E : The Energy which Regeneration Resistor 
consumes (J) 
5 
Calculate the Power for 
regeneration resistor  
4.0/)/(= TEP
RR
 
R
P : Regeneration Resistor Power(W) 
: Operating cycle for servo system(s) 
Note 1:   0.4 in the formula for 
R
P  corresponds to 40% regeneration duty cycle.  
Note 2:   If the 
L
E  can not be calculated, then let 0=
L
E , then calculate ER. 
  In applications with regenerative loads, which cause reverse torque, a large amount of 
energy will flow back to the driver.  
  In such applications, calculate ER and hence regeneration resistor power according to 
the formula below.  
Item  Formula  Description for Symbols 
Calculate the working Energy 
during the continuous 
regenerative period. 
GGGrmG
tTωπE
,
)60/(=
 
G
E : Working Energy during the regenerative
          period. (J) 
Grm
ω
,
: Motor running speed during the 
         regenerative period . (rpm) 
G
T : Loading Torque during the regenerative 
         period (Nm) 
G
t : Regenerative Time. (s) 
The formula for step 4 in the previous table will be: 
GCLMR
EEEEE +)+(-=  
 
5-6-8 Fan Setting 
Available models that equipped with the fan. 
Parameter   Name  Setting Description 
Control 
Mode
0  Auto-run by internal temperature sensor. 
1  Run when Servo ON 
2 Always Running. 
Cn031.0 
Cooling fan running 
mode 
3 Disabled. 
ALL