Chapter 7 Replacement Of Program - Mitsubishi Electric MELSEC Q Series Handbook

7
REPLACEMENT OF PROGRAM
7
This chapter describes replacement procedures and precautions for using programs and comments of
the AnS/QnASCPU in the QCPU.
(1) Comparison between AnSCPU and QCPU
Item
Main
Sequence
program
SFC
Microcomputer
program
Instruction
File register
Timer, Counter
7
- 1
REPLACEMENT OF PROGRAM
7
AnSCPU specifications
• Main program is required.
• The SFC is dealt as the
microcomputer program of main
program.
• A user-created microcomputer
program and the microcomputer
program of the utility package are
available.
• Dedicated instructions for the
ACPU (LED instruction, etc.) are
available.
• Storage area is reserved in a
memory cassette.
• One block is set in 8 k points unit.
• Timer and counter are processed
with the END.
: Compatible,
QCPU specifications and
precautions for replacement
[Specification]
• Each program is dealt as one file.
[Measure]
• Execute the file setting of PLC
parameter.
[Specification]
• Creating microcomputer program is not
applicable.
[Measure]
• Replace the AnSCPU user-created
microcomputer program with sequence
program since the microcomputer
program execution is not applicable.
• For utility packages instructions, correct
them equivalent to the corresponding
instructions of the QCPU.
[Specification]
• With "Change PLC type", instructions
are converted automatically except
some instructions.
[Measure]
• The instructions that cannot be
converted are changed to SM1255 and
SD1255 for QCPU. Therefore, program
modification is required.
[Specification]
• Data is stored in a standard RAM or
memory card.
• One block is set in 32k points unit.
[Measure]
• Execute the file setting of PLC
parameter.
[Specification]
• Timer and counter are processed when
executing an instruction.
[Measure]
• Review the programs since the
processing timing differs between timer
and counter.
:Partially changed, : Incompatible
Compat-
Reference
ibility
Section
7.7.10

–
Section 7.2
Section
7.7.11
Section
7.7.4,
Section
7.7.5