Mitsubishi MELSEC-A series

1. INTRODUCTION
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MELSEC-A
1. INTRODUCTION
This manual explains how to use the MELSEC-A series sequence control
instructions and microcomputer programs.
MELSEC-A series programmable controllers have a parameter which is used to
designate functions and device use ranges.
The functions and device use ranges are determined by the parameter values.
The parameters of CPU are set to default values. If the default can be used for the
purpose, it is not necessary to set the parameter.
The user’s programs for the MELSEC-A series PCs are classified as follows.
ACPU Programming Manual (fundamental) gives the programs which can be used
for CPUs.
Table 1.1 gives the applicable CPUs the abbreviations used in this manual.
User’s
program
Main routine program
Subroutine program
Interruption program
Utility program
User creating
microcomputer program
Main routine program
Subroutine program
Interruption program
User creating
microcomputer program
Subsequence
program
Submicrocomputer
program
Sequence program
Microcomputer
program
Main program
Subprogram