Chapter 6  Control Modes of Operation|ASDA-A&A+ Series 
Revision April 2009     6-9 
Total acceleration time = TACC + TSL 
Total deceleration time = TDEC + TSL   
NOTE
 
1)  If the control of the servo motor is achieved via internal parameters, the command curve 
should be defined by the users. Therefore, when the command source is internal parameter, 
ensure that the setting value of P1-36 is not set to 0 or the servo motor will not accelerate or 
decelerate during operation. 
2)  So if users change the control mode to Pr mode and switching power off and on, the servo 
drive of parameter P1-36 will auto set the value to 20. 
 
6.2.5  Electronic Gear Ratio 
Relevant parameters: 
P1 - 44▲ 
 
GR1  Electronic Gear Ratio (1st Numerator) (N1)  Communication Addr.: 012CH
Default: 1  Related Section: 
Applicable Control Mode: Pt, Pr  Section 6.2.5 
Unit: pulse   
Range: 1 ~ 32767 
Settings: 
Multiple-step electronic gear numerator setting. Please refer to P2-60~P2-62. 
 
P1 - 45▲ 
 
GR2  Electronic Gear Ratio (Denominator)  Communication Addr.: 012DH
Default: 1  Related Section: 
Applicable Control Mode: Pt, Pr  Section 6.2.5 
Unit: pulse   
Range: 1 ~ 32767 
Settings: 
Electronic gear denominator setting. 
Please set electronic gear ratio when the servo drive is Off. As the wrong setting may cause 
motor to run chaotically (out of control) and it may lead to personnel injury, therefore, ensure to 
observe the following rule when setting P1-44, P1-45. 
The electronic gear ratio setting (Please also see P1-44, P2-60 ~ P2-62): 
f1
f2 = f1 x
N
M
N
M
Pulse input
Position
command
 
 
The electronic gear ratio setting range must be within: 1/50<N/M<200. 
 
f1: Pulse input               f2: Position command 
N: Numerator 1, 2, 3, 4, the setting value of P1-44 or 
P2-60 ~ P2-63 
M: Denominator, the setting value of P1-45
 
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