211933-21
211933-21
211933-21
(1)对于需要长期保存的非共享数据(如采样值的数模转换系数、控制组态值等)采用文件管理系统直接存取。
(2)对于数据量大而
工控软件无特殊要求的共享数据(如操作者纪录等),将其存放在外存数据库中。外存数据库采用Microsoft SQL Server数据库,由实时数据库提供的接口函数对它进行操作。
(3)对于每个采样周期都要更新的数据。这样,通过使用外存数据库(Microsoft SQL Server数据库)、文管系统和内存数据库(实时数据库),既保证了数据的共享性、独立性、安全性、完整性,又节约了内存,保证了系统的响应速度。
◆ 企业名称:厦门泰尼电气有限公司
◆ 主营业务:DCS,PLC
◆ 经营模式: 贸易
◆ 贸易地区:
◆ 联系人: 小黄《女士》
◆ 电话:
◆手机:
◆ QQ:2917675397
◆ 传真: (备注“01006”收)
◆ E-mail: 2917675397@qq.com
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