COBOL access record-sequential dataset sample

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原创最新推荐文章于 2026-07-07 16:40:09 发布 837 阅读 AI 写同款· GEO 优化 ›

Python读取三菱PLC数据 3、支持自定义的数据读写操作。直接调用Read方法，可以读取到原生的byte数组，然后进行组合数据。1、每次的数据交互您都可以判断是否成功，如果您不判断，如果网络断开或是异常，会影响程序的执行。Qna3E协议的ascii类 MelsecMcAsciiNet。A兼容1E协议的二进制类 MelsecA1ENet。Qna3E协议的二进制类 MelsecMcNet。2、读写操作支持单个数和数组。阅读详情

This is a serial code samples of how COBOL access dataset

Write Fixed-Length Record-Sequential Dataset

       IDENTIFICATION   DIVISION.
       PROGRAM-ID.      WRITEF16.
       ENVIRONMENT      DIVISION.
       INPUT-OUTPUT     SECTION.
       FILE-CONTROL.
         SELECT F16-FILE
            ASSIGN TO "DATA.F16"
            ORGANIZATION IS SEQUENTIAL
            ACCESS MODE IS SEQUENTIAL.
       DATA DIVISION.
       FILE SECTION.
         FD  F16-FILE
             LABEL RECORD STANDARD
             DATA RECORD DATAF16-REC.
         01  DATAF16-REC.
             03 F16-S-ID    PIC X(02).
             03 F16-S-NAME  PIC X(04).
             03 F16-S-VALUE PIC X(10).

       WORKING-STORAGE SECTION.

       PROCEDURE   DIVISION.
            OPEN OUTPUT F16-FILE.

            MOVE "11" TO F16-S-ID.
            MOVE "AAAA" TO F16-S-NAME.
            MOVE "1234567890" TO F16-S-VALUE.
            WRITE DATAF16-REC.

            MOVE "22" TO F16-S-ID.
            MOVE "BBBB" TO F16-S-NAME.
            MOVE "123456789 " TO F16-S-VALUE.
            WRITE DATAF16-REC.

            MOVE "33" TO F16-S-ID.
            MOVE "CCCC" TO F16-S-NAME.
            MOVE "12345678" TO F16-S-VALUE.
            WRITE DATAF16-REC.

            CLOSE F16-FILE.

            STOP RUN.

Read Fixed-Length Record-Sequential Dataset

       IDENTIFICATION   DIVISION.
       PROGRAM-ID.      READF16.
       ENVIRONMENT      DIVISION.
       INPUT-OUTPUT     SECTION.
       FILE-CONTROL.
         SELECT FILE-F16 ASSIGN TO "DATA.F16"
            ORGANIZATION IS SEQUENTIAL
            ACCESS MODE IS SEQUENTIAL 
            FILE STATUS IS IO-STATUS.
       DATA DIVISION.
       FILE SECTION.
         FD  FILE-F16
             LABEL RECORD STANDARD
             DATA RECORD DATAF16-REC.
         01  DATAF16-REC.
             03 F16-S-ID    PIC X(02).
             03 F16-S-NAME  PIC X(04).
             03 F16-S-VALUE PIC X(10).

       WORKING-STORAGE SECTION.
         01  IO-STATUS PIC XX.
         01  REC-COUNT PIC 9(6).

       PROCEDURE DIVISION.

            OPEN INPUT FILE-F16.
            IF IO-STATUS NOT = "00"
                DISPLAY "OPEN INPUT FAILED"
                DISPLAY "IO-STATUS =" IO-STATUS
                GO TO FIN-REL
            END-IF.

         READ-SEQUENTIAL.
            MOVE SPACES TO DATAF16-REC.
            READ MW-ENTREE NEXT
              AT END GO TO FIN-REL
            END-READ.
            IF IO-STATUS NOT = "00"
                DISPLAY "READ RECORD FAILED"
                DISPLAY "IO-STATUS =" IO-STATUS
                GO TO FIN-REL
            END-IF.
            PERFORM DISPLAY-RECORD THRU E-DISPLAY-RECORD.
            GO TO READ-SEQUENTIAL.

         FIN-REL.
            CLOSE MW-ENTREE.
      
            EXIT PROGRAM.
            STOP RUN.

         DISPLAY-RECORD.
           DISPLAY "RECORD" ": S-ID=[" F16-S-ID "]"
                            ", S-NAME=[" F16-S-NAME "]"
                            ", S-VALUE=[" F16-S-VALUE "]".
         E-DISPLAY-RECORD.
           EXIT.

Write Variable-Length Record-Sequential Dataset

       IDENTIFICATION   DIVISION.
       PROGRAM-ID.      WRITEV16.
       ENVIRONMENT      DIVISION.
       INPUT-OUTPUT     SECTION.
       FILE-CONTROL.
         SELECT V16-FILE
            ASSIGN TO "DATA.V16"
            ORGANIZATION IS SEQUENTIAL
            ACCESS MODE IS SEQUENTIAL.
       DATA DIVISION.
       FILE SECTION.
         FD  V16-FILE
             LABEL RECORD STANDARD
             RECORD is VARYING in SIZE from 1 to 16
             DEPENDING ON DATAV16-REC-LEN
             DATA RECORD DATAV16-REC.
         01  DATAV16-REC.
             03 V16-S-ID    PIC X(02).
             03 V16-S-NAME  PIC X(04).
             03 V16-S-VALUE PIC X(10).

       WORKING-STORAGE SECTION.
         01  DATAV16-REC-LEN   PIC X(4) COMP-X.

       PROCEDURE   DIVISION.
            OPEN OUTPUT V16-FILE.
            MOVE "11" TO V16-S-ID.
            MOVE "AAAA" TO V16-S-NAME.
            MOVE "1234567890" TO V16-S-VALUE.
            MOVE 16  TO DATAV16-REC-LEN.
            WRITE DATAV16-REC.
            MOVE "22" TO V16-S-ID.
            MOVE "BBBB" TO V16-S-NAME.
            MOVE "123456789 " TO V16-S-VALUE.
            MOVE 16  TO DATAV16-REC-LEN.
            WRITE DATAV16-REC.
            MOVE "33" TO V16-S-ID.
            MOVE "CCCC" TO V16-S-NAME.
            MOVE "12345678" TO V16-S-VALUE.
            MOVE 14  TO DATAV16-REC-LEN.
            WRITE DATAV16-REC.

            CLOSE V16-FILE.
            STOP RUN.

Read Variable-Length Record-Sequential Dataset

       IDENTIFICATION   DIVISION.
       PROGRAM-ID.      READV16.
       ENVIRONMENT      DIVISION.
       INPUT-OUTPUT     SECTION.
       FILE-CONTROL.
         SELECT MW-ENTREE ASSIGN TO "DATA.V16"
            ORGANIZATION IS SEQUENTIAL
            ACCESS MODE IS SEQUENTIAL 
            FILE STATUS IS IO-STATUS.
       DATA DIVISION.
       FILE SECTION.
         FD  MW-ENTREE
             LABEL RECORD STANDARD
             RECORD is VARYING in SIZE from 1 to 16
             DEPENDING ON DATAV16-REC-LEN
             DATA RECORD DATAV16-REC.

         01  DATAV16-REC.
             03 V16-S-ID    PIC X(02).
             03 V16-S-NAME  PIC X(04).
             03 V16-S-VALUE PIC X(10).

       WORKING-STORAGE SECTION.
         01  DATAV16-REC-LEN   PIC X(4) COMP-X.

         01  IO-STATUS PIC XX.
         01  REC-COUNT PIC 9(6).

       PROCEDURE DIVISION.

            OPEN INPUT MW-ENTREE.
            IF IO-STATUS NOT = "00"
                DISPLAY "OPEN INPUT FAILED"
                DISPLAY "IO-STATUS =" IO-STATUS
                GO TO FIN-REL
            END-IF.

         READ-SEQUENTIAL.
            MOVE SPACES TO DATAV16-REC.
            READ MW-ENTREE NEXT
              AT END GO TO FIN-REL
            END-READ.
            IF IO-STATUS NOT = "00"
                DISPLAY "READ RECORD FAILED"
                DISPLAY "IO-STATUS =" IO-STATUS
                GO TO FIN-REL
            END-IF.
            PERFORM DISPLAY-RECORD THRU E-DISPLAY-RECORD.
            GO TO READ-SEQUENTIAL.

         FIN-REL.
            CLOSE MW-ENTREE.
      
            EXIT PROGRAM.
            STOP RUN.

         DISPLAY-RECORD.
           DISPLAY "RECORD" 
                            ": LENGTH=[" DATAV16-REC-LEN "]"
                            ", S-ID=[" V16-S-ID "]"
                            ", S-NAME=[" V16-S-NAME "]"
                            ", S-VALUE=[" V16-S-VALUE "]".
         E-DISPLAY-RECORD.
           EXIT.

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