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说明
从270系列起WinCC flexible 提供了归档变量和消息的选项。在为归档指定名称的时候一些特殊字符可能无法使用。n
内容：
1. 为归档分配名称
1.1 归档名称允许的字符
1.2 归档名称中数字的问题
2. 为归档变量分配名称
1. 为归档分配名称
WinCC flexible 项目中归档名称必须唯一。这同样也适用于为不同归档选择不同的存储路径。同样也要为消息归档和变量归档分配不同的名称。n
归档名称必须由有效的ANSI字符组成。n
1.1 归档名称允许的字符
数据源的名称可以使用的字符取决于存储位置。
| 存储位置 | 备注 | 使用 | 字符 |
| 文件 | 当存储位置为“文件-RDB”，“文件 - CSV （ASCII）”和“文件- TXT （Unicode）”时不能使用下列字符。 |
| / * ? : " < > | |
| 数据库 | 当存储位置为“数据库”时可以使用下列字符。 n
注意： |   | a-z A-Z n
0-9 _ @ # $ |
n
1.2 归档名称中数字的问题
如果归档名称以数字结尾，会引起消息或过程值被存储到错误的归档里。
| 例如：创建一个名为“Arc2”的归档。 |
| 下列归档被创建： C:Arc20 然后创建归档“Arc”。归档方法选择“自动创建分段循环记录”。如果归档“Arc”达到规定的容量，下列归档会被创建： C:Arc0 C:Arc1 : C:Arc20 第二十个分段记录和已经创建的路径为“C：Arc20”的归档“Arc2”会产生冲突。 |
2. 为对档变量分配名称
当在 csv 文件（CSV， RDB 或 TXT）中归档变量时，需要保证变量名称中不包含特殊语言的特殊字符（ä， ö，ü， ...）。
背景：
如果包含特殊字符号的变量在英文操作系统例如 Windows CE （OP27x, TP 27x, MP 27x, MP 37x）中被归档，可能无法从归档中读出这些变量的值。因此，建议变量名称不要使用任何特殊语言的特殊字符。
关键字：
归档名称， 归档指定，OP270，OP277，TP270，TP277，MP270B， MB277， MP370， MP377
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Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
Warning: mysqli_query(): (HY000/1194): Table 'wp_options' is marked as crashed and should be repaired in D:\wwwroot\www.zhaoplc.com\wp-includes\class-wpdb.php on line 2357
原创文章，作者：ximenziask，如若转载，请注明出处：https://www.zhaoplc.com/plc334035.html
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