Ladder logic program example – Yaskawa MP940 User Manual

Page 412

Motion Control

11.2.2 Speed Control Mode

11-10

Ladder Logic Program Example

Fig 11.2 RUN Commands (DWG H01)

The example in the above illustration has been greatly simplified. In actual operation, each
register can be controlled from the user program.

IFON

ELSE

IEND

DEND

RUN

OBC0010

RUNPB

IB00104

ACCEL

IB00105

500

NREF

⇒

OWC015

NREF

⇒

OWC015

H0101

RUNMOD

⇒

OWC000

Set the Speed Control Mode to ON.

Driver RUN command (RUN)

When IB00104 turns ON, the Speed

Control Mode starts.

When the acceleration command

(IB00105) turns ON, a speed refer-

ence of 50% is output for the accel-

eration time constant (ACC).

When IB00105 turns OFF, the

deceleration time constant (DEC)

decelerates to a stop (a speed refer-

ence of 0% is output).