ST PROGRAM CREATION PROCEDURE
The following flowchart indicates the general procedure of ST programming.
In the following example, parts were created with the function block function and a
main program was then created in ST language.
Creation of new project
FB variable definition
FB definition
Define the variables used in FB definition.
For details, refer to the GX Developer
Operating Manual (Function Block).
Define the FB.
For details, refer to the GX Developer
Operating Manual (Function Block).
Program label definition
ST programming
Define the global variables and local labels
in a program.
For details, refer to the GX Developer
Operating Manual.
Convert (compile) the ST program into a
program that can be executed by the PLC CPU.
Refer to Section 3.4 for details.
Convert (compile)
Write to PLC Perform write to the PLC CPU.
For details, refer to Chapter 4 and GX Developer
Operating Manual.
Confirm the program behavior by conducting a device test.
Refer to Chapter 4 for details.
Online debugging
End
Refer to Section 3.1 for details.
Create the ST program that will call the FB.
Refer to Section 3.2 for details.
This general procedure is for reference. Each operation can be performed in any
order.
FB definition can be described in ST language or ladder form.
The following flowchart indicates the general procedure of ST programming.
In the following example, parts were created with the function block function and a
main program was then created in ST language.
Creation of new project
FB variable definition
FB definition
Define the variables used in FB definition.
For details, refer to the GX Developer
Operating Manual (Function Block).
Define the FB.
For details, refer to the GX Developer
Operating Manual (Function Block).
Program label definition
ST programming
Define the global variables and local labels
in a program.
For details, refer to the GX Developer
Operating Manual.
Convert (compile) the ST program into a
program that can be executed by the PLC CPU.
Refer to Section 3.4 for details.
Convert (compile)
Write to PLC Perform write to the PLC CPU.
For details, refer to Chapter 4 and GX Developer
Operating Manual.
Confirm the program behavior by conducting a device test.
Refer to Chapter 4 for details.
Online debugging
End
Refer to Section 3.1 for details.
Create the ST program that will call the FB.
Refer to Section 3.2 for details.
This general procedure is for reference. Each operation can be performed in any
order.
FB definition can be described in ST language or ladder form.
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