2phase stepper control, how to?

yammi5125

Member

Y

Join Date

Jul 2006

Location

Johor

Posts

3

• Jul 14, 2006

• #1

Hi there,

I want to use my FX1s mitsubishi PLC to control my OM 2phase stepper motor.

I just need a simple program at this moment, only can drive this 2phase motor run forward and reverse is enough.

But how to write this ladder code?

Hope someone out there can give me a hand, and thanks

Poh

 

Sergei Troizky

Member

S

Join Date

Oct 2004

Location

Montreal

Posts

736

• Jul 14, 2006

• #2

What stepper amplifier are you using.
Does it support pulse/direction format?
Is it already properly connected to PLC? If not, what is the amplifier inputs electrical format?

 

yammi5125

Member

OP

Y

Join Date

Jul 2006

Location

Johor

Posts

3

• Jul 17, 2006

• #3

I'm using CD2112 for my PK245 2phase stepper motor. Actually I know that there is a function call - PLSY to output a series of pulse to this driver. But I just donno how to write in the ladder program to make it reverse and forward operation.

 

Sergei Troizky

Member

S

Join Date

Oct 2004

Location

Montreal

Posts

736

• Jul 18, 2006

• #4

Another PLC input must control the direction.
PLSY is not the best instruction for the stepper control since it does not itself apply acceleratio/decelearation.
See PLSR, DRVA and DRVI instructions in the programming manual.

 

yammi5125

Member

OP

Y

Join Date

Jul 2006

Location

Johor

Posts

3

• Jul 18, 2006

• #5

Thank for your reply,

I've write a program in my GX developer, but just donno why it cannot use the simulator to monitor the output. I suspect I wrote a wrong format, that's why I hope somebody can give me some sample code for driving this stepper motor forward / reverse