ASDA-B2  Chapter 6  Control Modes of Operation 
Revision May, 2018     6-21 
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.