Specifications

6. Basic Instructions

6-13

2. Every subroutine of a step point is the same as a general ladder diagram, but there are some limitations to the

commands.

1. Do not use MC/MCR commands in step points.

2. STL commands cannot be used in Sub-programs and Interrupt programs.

3. Try to avoid using CJ commands in the STL program, it will complicate the entire program.

3. It is always better to finish all commands before moving to the next step

point. The SET Sn command is better to be placed at the end of step point,

as shown below.

S10

S20

SET S20

S10

S20

SET S20

 Step ladder diagram:

SET S0

SET S30

S00

M1002

S30

SET S31

SET S32

SET S33

S32

S36

SET S36

S37

S36

RET

END

S37 X7

Step S0

Step S30

Step S32

Step S36

Step S36/37

Use RET (return command) at the end of

step ladder that begins with initial step

point S0