In the above program, GX IEC Developer considers that each program routine which carries out
a specific task to be a POU or program organisation unit.
Each POU can be written using any of the supported editors i.e. LD, IL, FBD, SFC, ST as shown
below:
Overall Project Configuration illustrating POU integration using SFC, FBD, IL, LD and MELSEC
IL and ST format programs.
POU Pool
A Project will consist of many POU’s, each providing a dedicated control function and held in a
POU Pool. Each POU could be written in any of the IEC editors. Therefore in any given project,
the best language for the required function can be chosen. The compiler will assemble the pro-
ject into code the PLC can understand but the user interface remains as written.
In this way, perhaps complicated interlocking routines, could be written in a ladder POU, whilst
complex calculations or algorithms, might be better suited to one of the textual, or FDB editors.
It is the choice of the designer/user but this environment allows flexibility.
Software Structure and Definition of Terms
Programming
3 - 4
MITSUBISHI ELECTRIC
Typical PLC program event sequence
Содержание FX2N-32CAN
Страница 1: ...MITSUBISHI ELECTRIC FACTORY AUTOMATION Programmable Logic Controllers GX IEC Developer ...
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Страница 10: ...IV MITSUBISHI ELECTRIC ...
Страница 18: ...Modular PLC Training Hardware Course Overview and Requirements 1 2 MITSUBISHI ELECTRIC ...
Страница 172: ...Monitoring Instances of Function Blocks Advanced Monitoring Functions 7 12 MITSUBISHI ELECTRIC ...
Страница 176: ...Device Edit 8 4 MITSUBISHI ELECTRIC ...
Страница 190: ...Assigning DUT Variables to Function Blocks Data Unit Types DUT 10 10 MITSUBISHI ELECTRIC ...
Страница 198: ...Array Example Single Dimension Array Arrays 11 8 MITSUBISHI ELECTRIC ...
Страница 219: ...Sequential Function Chart SFC SFC Elements Training Manual GX IEC Developer 14 3 ...
Страница 220: ...14 3 SFC configuration examples SFC configuration examples Sequential Function Chart SFC 14 4 MITSUBISHI ELECTRIC ...
Страница 230: ...Structured Text Program Example IEC Structured Text 16 4 MITSUBISHI ELECTRIC ...
Страница 248: ...Configuring GX IEC Developer to access the PLC on Ethernet Ethernet Communications 18 10 MITSUBISHI ELECTRIC ...
Страница 278: ...PLC Components Glossary Appendix A 18 MITSUBISHI ELECTRIC ...
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