Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 129)

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YASNAC PCNC PLC Programming Manual Chapter 4: Sequence Control Method
7.1 Outline of Offline System
The off-line system is used to create the sequence ladder by using the compiler, linker and
download tools among the utilities provided for the development of PLC sequence programs.
These tools run on the MS-DOS.
7.1.1 Operating Environment
Hardware: IBM PC/AT or compatibles
OS: MS-DOS Ver.6.2 or above.
Memory: 400K bytes minimum
7.1.2 Execution Files
The YASNAC PCNC off-line systems consists of the following software packages.
•
J1LCOMP.EXE Ladder language compiler
• J1LLINK.EXE Linker
7.1.3 Outline of the Execution Files
(1) Ladder Language Complier
The compiler compiles the source file, coded using the ladder language, to generate the object
file.
The processing objective data by the compiler is indicated below.
• Version number
• High-speed scan ladder program
• Low-speed scan ladder program
• Low speed ladder stop count
• Conversion data table
• Message data table
• Symbol data
PCNC treats the low-speed ladder stop count as no-meaning code.
(2) Linker
The linker generates the binary file in the executable format from the object file which is out-
put by the compiler.