AMS DCB-274 User Manual

5 5  

 

Function 

Type 

NV Bytes 

Index in Plus Direction 

Immediate, Program 

4 

Command 

Mnemonic 

(Name) + (n) 

Data 1 

Steps (0-16,777,215) 

Data 2 

None 

Result 

None 

 

Step in the positive direction for the specified step count.  
 
The motor will ramp up, slew, and then ramp down per the previously set parameters. The range is 0 to 
16,777,215. The position counter will overflow at 8,388,607. 

 

The motion sequence is: 

1. Wait until any previous motion is finished, 
2. Energize the motor winding as required, 
3. Start stepping at the rate of the initial velocity (I), 
4. Accelerate using a profile defined by the fixed table that approximates straight-line acceleration and a 
slope set by the “K” command,  
5. Accelerate until the slew speed, as specified by the “V” command, is attained, 
6. Motion continues at the slew speed, until the deceleration point is reached, 
7. Decelerate (determined by the second “K” value) to a stop completing the index,  
8. If another index is not commanded for the settling period, power down the motor (if auto power down 
is enabled). 
 

The DCB-274 is factory set with the following program example: 
 

P 0 

Enter program mode. 

 

+ 1001 

Move 1001 steps in the plus direction. 

 

W 100 

Wait 100 milliseconds. 

 

- 1000 

Move 1000 steps in the minus direction. 

 

W 100 

Wait 100 milliseconds. 

 

Z 0 

Display step position. 

 

G 0 0 

Go to location 0 and run stored program. 

 

P 

Exit program mode. 

 

Function 

Type 

NV Bytes 

Index in Minus Direction 

Immediate, Program 

4 

Command 

Mnemonic 

(Name) – (n) 

Data 1 

Steps (0-16,777,215) 

Data 2 

None 

Result 

None 

 

Same as “+” command only in the opposite direction.