Mitsubishi A1SD51S, Руководство по программированию

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MELSEC-Q
11 INSTRUCTIONS AND FUNCTIONS
RSET
Instruction
Right SET
• Moves data from memory to a random file buffer, in preparation for the PUT instruction.
RSET <character string variable>=<character string expression>
Syntax
character string variable • • • • Specify a character string variable defined by the
FIELD instruction.
character string expression • • • • Specify the character string data to be written.
RSET A$=" MITSUBISHI" • • • • Stores " MITSUBISHI" in A$ right-justified.
Examples
Random file buffer
RSET
A$ M I T S U B I S H I
Description
• The RSET instruction moves data from memory to a random file buffer, in preparation for
the PUT instruction.
• In order to execute the RSET instruction, it is necessary to open a file as a random file in
advance.
• It is necessary to use the FIELD instruction to define a character string variable before
executing the RSET instruction.
• If the character string expression is shorter than the field length assigned to the character
string variable by the FIELD instruction, the RSET instruction stores the character string
right-justified in the field.
The extra part of the field is filled by blank spaces.
Example
N A G O Y A
Field length: 10 Character string: NAGOYA
Field length 10
• If the character string expression is longer than the field length assigned by the FIELD
instruction, the excess part of the character string is truncated from the right.
Example
N A G O Y A
Field length:
10 Character string: NAGOYASEISAKUSYO
Field length 10
S E I S
• It is required to convert a numeric value into a character string using one of functions MKI$,
MKS$, and MKD$, before using the RSET to transfer it to the random file buffer.
REMARK
See the FIELD, PUT, GET and LSET instructions, and Chapter 6.