ASDA-A2  Chapter 6  Control Mode of Operation 
Revision February, 2017  6-31 
6.3.5  Timing Diagram in Speed Mode 
S4 (P1-11)
S3 (P1-10)
S2 (P1-09)
S1
SPD0
SPD1
SON
OFF
ON
OFF
ON
ON
OFF
ON
Internal speed
command
External analog
voltage or zero (0) 
External I/O signal
 
 
NOTE
 
1) OFF means the contact point is open while ON means the contact point is 
close. 
2) When it is in Sz mode, the speed command S1 = 0; When it is in S mode, 
the speed command S1 is the external analog voltage input.  
3) When the servo drive is On, please select the command according to 
SPD0~SPD1 status. 
 
6.3.6  Gain Adjustment of Speed Loop  
Here introduces the function of speed control unit. The following shows its structure. 
 
Many kinds of gain in speed control unit are adjustable. Two ways, manual and auto, are provided 
for selection.