110531004 VARIAN 通信功能 实现数据传输

品牌:VARIAN

型号:110531004

生产国家/地区:美国

保质期：1年

110531004 VARIAN通信功能

大中型PLC系统应支持多种现场总线和标准通信协议(如TCPIP)，需要时应能与工厂管理网（TCPIP)相连接。通信协议应符合ISOIEEE通信标准，应是开放的通信网络。

110531004 PLC系统的通信接口应包括串行和并行通信接口(RS2232C422A4423485)、RIO通信口、工业以太网、常用DCS接口等;大中型PLC通信总线（含接口设备和电缆)应1:1冗余配置，通信总线应符合标准，通信距离应满足装置实际要求。

PLC系统的通信网络中，上级的网络通信速率应大于1Mbps，通信负荷不大于60%。PLC系统的通信网络主要形式有下列几种形式;1)PC为主站，多台同型号PLC为从站，组成简易PLC网络;2)1台PLC为主站，其他同型号PLC为从站，构成主从式PLC网络; 3)PLC网络通过特定网络接口连接到大型DCS中作为DCS的子网;4)专用PLC网络(各厂商的专用PLC通信网络)。

VARIAN通信功能是利用接口技术进行进程通信，由于是跨进程，指针是不能传递的，COM提供了Variant类型的参数传递方式。如：进程P1把数据放在Var中，调用进程2

P2.SetData(VARIANT Var)进行传送时，系统会进程1的Var数据在进程2的内存空间copy一份一模一样的数据，然后才调用真正的SetData。

通讯卡件

110531004 通讯卡件是一种用于实现通讯功能的硬件设备，通常用于连接计算机和其他设备之间的数据传输。通讯卡件通常插在计算机的主板上，通过与外部设备的连接，实现数据传输和通讯功能。

根据不同的通讯协议和传输速率，通讯卡件有很多种类，如以太网网卡、调制解调器卡、光纤通道卡、串口卡等等。不同类型的通讯卡件适用于不同的应用场景，如以太网网卡适用于局域网通信，调制解调器卡适用于电话线路通信，光纤通道卡适用于高速光纤网络通信，串口卡适用于串行通信等等。

110531004 通讯卡件还可以提供一些附加功能，如数据加密、数据压缩、错误校验等等，以确保数据传输的可靠性和安全性。此外，一些通讯卡件还可以提供额外的接口和控制功能，如光纤通道卡可以提供光纤通道接口和控制功能，串口卡可以提供串行接口和控制功能等等。

总之，110531004通讯卡件是实现计算机和其他设备之间数据传输的重要设备，根据不同的应用场景选择合适的通讯卡件可以提高数据传输的效率和可靠性。

110531004 VARIAN 通信功能 实现数据传输

Brand :VARIAN

Model :110531004

Country of production: USA

Shelf life: 1 year

110531004 VARIAN Communication function

Large and medium-sized PLC systems should support a variety of fieldbuses and standard communication protocols (such as TCPIP), and should be able to connect with the factory management network (TCPIP) when needed. The communication protocol should conform to the ISOIEEE communication standard and should be an open communication network.

The communication interface of 110531004 PLC system should include serial and parallel communication interface (RS2232C422A4423485), RIO communication interface, industrial Ethernet, common DCS interface, etc. Large and medium-sized PLC communication bus (including interface equipment and cables) should be 1:1 redundant configuration, the communication bus should meet the standards, and the communication distance should meet the actual requirements of the device.

In the communication network of the PLC system, the superior network communication rate should be greater than 1Mbps, and the communication load should not be greater than 60%. The communication network of PLC system has the following main forms; 1)PC is the main station, and multiple PLCS of the same model are the slave station to form a simple PLC network; 2) One PLC is the main station, and other PLC of the same model is the slave station, which constitutes the master-slave PLC network; 3) The PLC network is connected to a large DCS as a DCS subnet through a specific network interface; 4) Dedicated PLC network (dedicated PLC communication network of various manufacturers).

VARIAN's communication function uses interface technology to communicate processes. Since it is cross-process, Pointers cannot be passed. COM provides Variant parameter passing methods. For example, process P1 puts data in Var and calls process 2

When transmitted by VARIANT Var, the system copies the Var data of process 1 into the memory space of process 2, and then calls the real SetData.

Communication card

110531004 Communication card is a hardware device used to achieve communication functions, usually used to connect the data transmission between computers and other devices. Communication card is usually inserted in the main board of the computer, through the connection with external devices, to achieve data transmission and communication functions.

According to different communication protocols and transmission rates, there are many types of communication cards, such as Ethernet cards, modem cards, fibre channel cards, serial cards and so on. Different types of communication cards are suitable for different application scenarios, such as Ethernet card for local area network communication, modem card for telephone line communication, Fibre Channel card for high-speed optical network communication, serial card for serial communication and so on.

110531004 communication card can also provide some additional functions, such as data encryption, data compression, error check, etc., to ensure the reliability and security of data transmission. In addition, some communication cards can also provide additional interface and control functions, such as Fibre Channel card can provide Fibre Channel interface and control functions, serial card can provide serial interface and control functions and so on.

In short, 110531004 communication card is an important equipment to achieve data transmission between computers and other equipment, according to different application scenarios to choose the appropriate communication card can improve the efficiency and reliability of data transmission.