主系统

现介绍DCS系统中主系统与子系统的通讯问题&DCS串行接口的通讯界面、通讯方式、MODBUS通讯协议等。

Now the communication between main system and subsystem in DCS-communication interface of DCS serial ports , communication methods , MODBUS communication agreement etc.

硬件主要有CPU主系统、模拟量输入电路设计、开关量输入输出回路的设计、人机对话接口设计、通信接口的设计以及电源设计；

The hardware mainly includes the designs of the CPU main system , the simulated measurement input circuit , the switch measurement input-output circuit , man-machine interface , communication interface and power .

一个DB2HADR场景由两个DB2系统组成，一个是主系统，一个是备用系统。

A DB2 HADR scenario consists of two DB2 systems , a primary and a standby .

如果主系统主机发生错误，虚拟IP地址就切换到备用机上。

In the event of a failure on the primary host , this virtual IP address fails over to the standby .

动力吸振器和隔振系统（主系统）的刚度均为Duffing类型的非线性刚度。

Both the isolation system and dynamic vibration absorber have Duffing type non-linear stiffness .

例如，MDM系统是主系统，而事务性系统是从系统。

So for example , it could be that the MDM system is the master and the transactional systems are the slave systems .

通过改造60万t跳汰系统，实现对A、B、C系统中煤再洗，使主系统洗九级精煤时，回收率提高了2%～4%。

By improving the 0 . 6 Mt jig preparation system , to realize re-separation for middling of A , B , C system , the recovery have raiaed 2 % ~ 4 % when the main system separat 9 level clean coal .

介绍了利津供电公司SCADA系统的RTU分站系统从硬件结构改造和软件设计两方面对遥信误动的处理，同时编写出了遥信误报判断的程序，并与主系统程序连接。

The paper presents how the sub master station of the SCADA system in Lijin processes the wrong action of telesignalling from the hardware stucture remoulding and software design .

同时，也可将主系统中的拓扑图按照1：1的比例，复制至Visio文件。

At the same time , the topological diagram in the main system also can be copied as Visio file within the ratio of 1:1 .

一旦维护任务完成，便可以打开HADR，系统自动重新同步，必要时可以切换角色，以便在原先的主系统上执行维护。

Once the maintenance task is complete , HADR can be turned on and the systems automatically resynchronizes and the roles can be switched if needed to allow the maintenance to be performed on the original primary .

在接下来的业务场景中，我们将假定无论包何时被传递给消费者，消息都必须发送给Posts-R-Us的主系统以便确认此传递。

Following our business scenario , we will assume that whenever a package has been delivered to a customer , a message must be sent to the main system at Posts-R-Us to confirm the delivery .

飞机主系统液压泵转速测试仪的设计与仿真

Rev Testing Meter of Plane 's Main System Hydraulic Pressure Pump

随后备用数据将流动到主系统中。

Then the standby data will flow to the primary .

子系统可以修正主系统的残余误差，从而实现角秒级的跟踪精度。

The sub-system can adjust the residual errors of the main system .

它实际上是一个附联到另外一个主系统的增值工具。

It is actually a value-added tool attached to another main system .

在非线性主系统上应用非线性动力吸振器

The application of nonlinear dynamic vibration in nonlinear main system

延边电网与主系统联网线路的输电能力分析

Analysis on Transmission Capacity of Link Line Between Yanbian Grid and Main Grid

在主系统上，用以下命令执行0级存档

On the primary system , perform a level-0 archive with the following command

而异步可用性则不保证主系统和辅助系统是完全同步的。

Asynchronous availability does not guarantee that primary and secondary system databases are completely synchronized .

在备用系统上执行维护时，主系统继续正常运行。

The primary continues to perform as normal while maintenance is performed on the standby .

数值分析结果表明这些算法能改进主系统的效用。

The result of numerical analysis indicates that these algorithms improve the profit of the primary service .

在故障转移过程中，数据源从主系统移动到辅助系统。

In the failover process , the data source is moved from the primary to the secondary system .

研究了子轴采样频率、子轴带宽以及子、主系统带宽比和复合轴系统动态跟踪精度的关系。

The relations among sub-axis sampling frequency and bandwidth , bandwidth ratio and dynamic tracking accuracy are studied respectively .

只要主系统和备用系统保持同步状态，它们之间的角色可以随意切换。

The roles of primary and standby can be switched at will as long as they are in a synchronized state .

默认情况下，此方法尝试仅与主系统所在的站点内的域控制器进行同步。

By default , this method attempts to synchronize only with domain controllers in the same site as the home system .

设备控制的主系统调用包括下列操作：打开、关闭、I/O控制、读/写等。

Main system calls for device control include the following operations : open , close , I / O control , read / write , etc.

同步可用性保证主系统和辅助系统上的数据源是一致的，完整的数据连续性是在故障转移之后维护的。

Synchronous availability guarantees that the data sources on primary and secondary systems are identical , and complete data continuity is maintained after a failover .

在复制了滞留的数据之后，即可在主系统上启动应用程序，将备用数据发送到主系统。

When the stranded data is replicated , the standby data can be sent to the primary by starting the apply program on the primary system .

在无线通信系统的设计时，保证主系统和各子系统之间可靠的数据通信是首要的。

While designing a wireless communication system , it is primary to insure the reliability of the data communica - tion between the master system and its subsystems .

我们将假设每当向客户机交付数据包时，必须向主系统发送一条消息来确认交付。

We will assume that whenever a package has been delivered to a client , a message must be sent to the main system to confirm the delivery .