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NCU6FC5357-0BB23-0AA1性能

主营西门子自动化产品,*,现货现售,价格优势,保证,价格优势本公司销售西门子PLC,西门子屏,西门子数控,西门子软启动,西门子以太网。西门子电机,西门子变频器,西门子直流调速器,西门子电缆。*,现货销售,价格优势,*.公司主营:西门子数控,V20变频器S7-200CN.S7-200smart.S7-300.S7-400.S7-1200.6ES5 ET200 人机界面,变频器,DP总线,MM420 变频器MM430 变频器MM440 6SE70交流工程调速变频器6RA70直流调速装置 SITOP电源,电线电缆,数控备件,伺服电机等工控产品.
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位字符串(BYTE、WORD、DWORD、LWORD)和数据类型 CHAR 首先扩展到所需
                的宽度(非符号替换为零),然后这些位。源类型决定了解释。

参见

                UDINT(32 位整数) (页 267)

                UDINT 隐式转换 (页 581)

                数据类型转换概述 (页 561)


对 PLC 进行编程
编程和操作手册, 10/2018                                                                         629数据类型
3.16 S7-1200 的数据类型转换: (S7-1200)

3.16.3.3     浮点数 (S7-1200)

REAL 显式转换 (S7-1200)

显式转换选项

                下表列出了 REAL 数据类型的显式转换选项和指令:


                                                                                对 PLC 进行编程
630                                                                       编程和操作手册, 10/2018                                                                                    数据类型
                                                       3.16 S7-1200 的数据类型转换: (S7-1200)


                源       目标       转换         说明                           指令助记符

                REAL    BOOL     -          不能进行显式转换                     -
                        BYTE     -                                       -
                        WORD     -                                       -
                        DWORD    X          将源值的位原样传递到目标               REAL_TO_DWORD
                                            数据类型。

                        SINT     X          将该值转换为目标数据类型。 转              REAL_TO_SINT,
                                            换的结果则取决于所使用的指                ROUND, CEIL,
                                            令。 如果转换期间超过目标数据              FLOOR, TRUNC,
                                            类型允许的值范围或待转换的值               NORM_X, SCALE_X
                        USINT    X          为无效浮点数,则将使能输出                REAL_TO_USINT,
                                            ENO 设置为“0"。                  ROUND, CEIL,
                                                                         FLOOR, TRUNC,
                                                                         NORM_X, SCALE_X
                        INT      X                                       REAL_TO_INT,
                                                                         ROUND, CEIL,
                                                                         FLOOR, TRUNC,
                                                                         NORM_X, SCALE_X
                        UINT     X                                       REAL_TO_UINT,
                                                                         ROUND, CEIL,
                                                                         FLOOR, TRUNC,
                                                                         NORM_X, SCALE_X
                        DINT     X                                       REAL_TO_DINT,
                                                                         ROUND, CEIL,
                                                                         FLOOR, TRUNC,
                                                                         NORM_X, SCALE_X
                        UDINT    X                                       REAL_TO_UDINT,
                                                                         ROUND, CEIL,
                                                                         FLOOR, TRUNC,
                                                                         NORM_X, SCALE_X
                        LREAL    X          将该值转换为目标数据类型。 转              REAL_TO_LREAL,
                                            换结果取决于所用的指令,如                ROUND, CEIL,
                                            TRUNC(2.5) = 2.0; CEIL(2.5) = FLOOR, TRUNC,
                                            3.0                          NORM_X, SCALE_X
                        TIME     -          不能进行显式转换                     -


对 PLC 进行编程
编程和操作手册, 10/2018                                                                         631数据类型
3.16 S7-1200 的数据类型转换: (S7-1200)

                 源      目标        转换         说明                          指令助记符

                        DTL       -                                      -
                        TOD       -                                      -
                        DATE      -                                      -
                        STRING    X          将数值转换为字符串。 如果超过             REAL_TO_STRING,
                                             字符串长度或待转换的值为无效              S_CONV,
                                             浮点数,则将使能输出 ENO 设            VAL_STRG
                        WSTRIN    X          置为“0"。 字符串长度少为             REAL_TO_WSTRIN
                        G                    14 个字符。                     G
                        CHAR      -          不能进行显式转换                    -
                        WCHAR     -                                      -
                 x: 可以转换
                 -: 不可转换

参见

                REAL (页 272)

                REAL 隐式转换 (页 583)

                数据类型转换概述 (页 561)


                                                                                对 PLC 进行编程
632                                                                       编程和操作手册, 10/2018                                                                                    数据类型
                                                       3.16 S7-1200 的数据类型转换: (S7-1200)

LREAL 显式转换 (S7-1200)

显式转换选项

                下表列出了 LREAL 数据类型的显式转换选项和指令:


对 PLC 进行编程
编程和操作手册, 10/2018                                                                         633数据类型
3.16 S7-1200 的数据类型转换: (S7-1200)



                 源      目标        转换         说明                       指令助记符

                 LREA   BOOL      -          不能进行显式转换                 -
                 L      BYTE      -                                   -
                        WORD      -                                   -
                        DWORD     -                                   -
                        SINT      X          将该值转换为目标数据类              LREAL_TO_SINT,
                                             型。 转换的结果则取决于所            ROUND, CEIL, FLOOR,
                                             使用的指令。 如果转换期间            TRUNC, NORM_X,
                                             超过目标数据类型允许的值             SCALE_X
                        USINT     X          范围或待转换的值为无效浮             LREAL_TO_USINT,
                                             点数,则将使能输出 ENO 设          ROUND, CEIL, FLOOR,
                                             置为“0"。                   TRUNC, NORM_X,
                                                                      SCALE_X
                        INT       X                                   LREAL_TO_INT,
                                                                      ROUND, CEIL, FLOOR,
                                                                      TRUNC, NORM_X,
                                                                      SCALE_X
                        UINT      X                                   LREAL_TO_UINT,
                                                                      ROUND, CEIL, FLOOR,
                                                                      TRUNC, NORM_X,
                                                                      SCALE_X
                        DINT      X                                   LREAL_TO_DINT,
                                                                      ROUND, CEIL, FLOOR,
                                                                      TRUNC, NORM_X,
                                                                      SCALE_X
                        UDINT     X                                   LREAL_TO_UDINT,
                                                                      ROUND, CEIL, FLOOR,
                                                                      TRUNC, NORM_X,
                                                                      SCALE_X
                        REAL      X          将该值转换为目标数据类              LREAL_TO_LREAL,
                                             型。 如果转换期间超过目标            ROUND, CEIL, FLOOR,
                                             数据类型允许的值范围或待             TRUNC, NORM_X,
                                             转换的值为无效浮点数,则             SCALE_X
                                             将使能输出 ENO 设置为
                                             “0"。 允许损失一些准确度。


                                                                                对 PLC 进行编程
634                                                                       编程和操作手册, 10/2018                                                                                    数据类型
                                                       3.16 S7-1200 的数据类型转换: (S7-1200)

                源       目标       转换         说明                        指令助记符

                        TIME     -          不能进行显式转换                  -
                        DTL      -                                    -
                        TOD      -                                    -
                        DATE     -                                    -
                        STRING   X          将数值转换为字符串。 如果             LREAL_TO_STRING,
                                            超过字符串长度或待转换的              S_CONV, VAL_STRG
                        WSTRIN   X          值为无效浮点数,则将使能              LREAL_TO_WSTRING
                        G                   输出 ENO 设置为“0"。 字符
                                            串长度少为 21 个字符。
                        CHAR     -          不能进行显式转换                  -
                        WCHAR    -                                    -
                x: 可以转换
                -: 不可转换

参见

                LREAL (页 273)

                数据类型转换概述 (页 561)


对 PLC 进行编程
编程和操作手册, 10/2018                                                                         635数据类型
3.16 S7-1200 的数据类型转换: (S7-1200)

3.16.3.4     定时器 (S7-1200)

TIME 显式转换 (S7-1200)

显式转换选项

                下表列出了 TIME 数据类型的显式转换选项和指令:


                                                                                对 PLC 进行编程
636                                                                       编程和操作手册, 10/2018                                                                                    数据类型
                                                       3.16 S7-1200 的数据类型转换: (S7-1200)


                源      目标     转换          说明                           指令助记符

                TIME   BOOL   -           不能进行显式转换                     -
                       BYTE1  X           将源值的位原样传递到目标               TIME_TO_BYTE
                       )                  数据类型。

                       WOR    X                                        TIME_TO_WORD
                       D1)
                       DWO    X                                        TIME_TO_DWORD
                       RD1)
                       SINT   X           源值的位以右对齐原样               TIME_TO_SINT
                       USIN   X           传递给目标数据类型,单位为毫               TIME_TO_USINT
                       T                  秒。
                       INT    X                                        TIME_TO_INT
                       UINT   X                                        TIME_TO_UINT
                       DINT   X           将源值的位原样传递到目标               TIME_TO_DINT,
                                          数据类型。 转换结果为时间              T_CONV
                                         (毫秒)。
                       UDIN   X           源值的位以右对齐原样               TIME_TO_UDINT
                       T                  传递给目标数据类型,单位为毫
                                          秒。 如果符号改变,则将使能输
                                          出 ENO 设置为“0"。
                       REAL   -           不能进行显式转换                     -


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