Creator Electronics CR-M4102 Especificações descarregar pdf (Página 69)

5 - 1

Chapter 5 SFC Program

This chapter describes the configuration and each element of the SFC program.

5.1 SFC program configuration

The SFC program consists of a combination of START, step, transition, and END, etc.,

as shown below.

Operation

start

END

• • • • •

Positioning

preparation

Positioning pre-

paration com-

pletion check

Program name

START: Indicates the start of the program.

Step (operation control step): Executes the

designated operation control program while the

system is active.

Transition (shift): Indicates the conditions for

shifting control to the succeeding step.

Step (motion control step): Executes the

designated servo program while the system is

active.

Transition (WAIT): Shows the condition to shift

the control to the succeeding step.

END: Shows the end of program.

Execution of

positioning

Positioning

completion

check

Operation end

SET Y0=X0+X10

D100=W0+W100

Y0+M100

ABS-1

Axis 1, D100

Speed 10000

!X0

The running SFC program operates as follows.

(1) The step (F0) is activated, and the designated operation is executed at step (F0)

(positioning preparation). The step in active state is called "Active step".

(2) Whether the conditions designated by transition (G0) are established (or whether

it is ready to start the positioning program) is checked.

When the conditions are established, the active step (F0) is inactivated, and the

succeeding step (K0) is activated (start of servo program K0).

(3) At transition (G1), whether the operation at step (K0) is completed (completion of

servo program K0 positioning) is checked. When the positioning is completed

(conditions established), the control is shifted to the succeeding step.

(4) The control is executed by shifting the active step as shown in the above items (1)

to (3), and ended when END is input.

POINT

The number of steps that can be an active step simultaneously is 256 or less (total

in all SFC programs).

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