Emerson FM-3 Instrukcja Instalacji Pobierz pdf (Strona 103)

Programming

Wait For Time 1.000 ‘seconds

DriveOutput.1=OFF

Wait For Index.AnyCommandComplete

Loop

Call Program

This program flow instruction is used to call another program. When the called program

finishes the controller picks up where it left off in the program that called it. This is often used

when a section of code is used in multiple places in a program. By moving the code to another

program and calling that program the total number of program lines can be reduced. This can

also make the program easier to understand. Care should be taken not to "nest" more than four

program calls due to processor stack overflow. Therefore, no more than four different programs

should be called without returning to the original program.

In the diagram below, => Represents a Call Program instruction

Examples:

Call Program.10 ‘Program 10 contains a complex home

‘routine.

Call Program.100 ‘Program 100 contains a “teach position”

‘routine.

End

This program flow instruction is used to halt the execution of the program. It can be used in

multiple places within the program. It is not required on the last line of every program. It is

implied that after the controller executes the last line of code in a program the program will halt.

It is commonly used inside of If/Then/Endif constructs to end the program if a certain condition

has been met.

Examples:

If DriveInput.1=OFF Then

End

Endif

If DriveInput.1=ON Then

DriveOutput.1=ON

End

Endif

Program0=>Program1=>Program2=>Program3=>Program4 => NO MORE THAN 4!

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 229 230

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Emerson FM-3 Instrukcja Instalacji Strona 103