Delta Electronics none Manual De Usuario

Chapter 6  Control Modes of Operation|ASDA-AB Series 

Revision March 2008, Doc. Name: 2007PDD23000011 

 

 

6-13 

The speed control mode (S or Sz) is usually used on the applications of precision speed control, such as 

CNC machine, etc. ASDA-AB series servo drive supports two kinds of command sources in speed control 

mode. One is external analog signal and the other is internal parameter. The external analog signal is from 

external voltage input and it can control the speed of servo motor. There are two usage of internal parameter, 

one is set different speed command in three speed control parameters before operation and then using 

SPD0 and SPD1 of CN1 DI signal perform switching. The other usage is using serial communication to 

change the setting value of parameter.  

Beside, in order to make the speed command switch more smoothly, ASDA-AB series servo drive also 

provides complete S-curve profile for speed control mode. For the closed-loop speed control, ASDA-AB 

series servo drive provides gain adjustment function and an integrated PI or PDFF controller. Besides, two 

modes of tuning technology (Manual/Auto) are also provided for the users to select (parameter P2-32). 

„

 

Manual Mode: User-defined loop gain adjustment. When using this mode, all auto and auxiliary 

function will be disabled.  

„

 

Auto Mode: Continuous adjustment of loop gains according to measured inertia, with ten levels of 

system bandwidth. The parameter set by user is default value. 

 

Speed command Sources:  

1)  External analog signal: External analog voltage input, -10V to +10V 

2)  Internal parameter: P1-09 to P1-11 

CN1 DI signal  

Speed 

Command 

SPD1

SPD0 

Command Source 

Content 

Range 

S 

External 
analog signal 

Voltage between V-
REF-GND 

+/-10 V 

S1 0 

0 

Mode

Sz

N/A 

Speed command is 
0 

0 

S2 0 

1 

P1-09 0~5000r/min 

S3 1 

0 

P1-10 0~5000r/min 

S4 1 

1 

Internal parameter 

P1-11 0~5000r/min 

„ 

State of SPD0~1: 0: indicates OFF (Normally Open); 1: indicates ON (Normally Closed) 

„ 

When SPD0 and SPD1 are both = 0 (OFF), if the control mode of operation is Sz, then the 

speed command is 0. Therefore, if the users do not use analog voltage as speed command, the 

users can choose Sz mode and avoid the zero point drift problem of analog voltage signal. If the 

speed control mode is S mode, then the command is the analog voltage between V-REF and