>>>>>型号:MVI56-MCM 主站/从站通信模块 串行通信协议的设备
【功能描述】
MVI56-MCM模块对ControlLogix背板使用方式是非常独特的。通过背板，模块使用自身
的输入和输出镜像以分页的方式，接收数据和发送数据到处理器。镜像刷新的频率取决于
用户为模块定义的计划扫描频率（scheduled scan rate）和模块的通讯负荷。典型的刷新
频率在2到10毫秒之间。
双向的数据传送是这样实现的，模块在其输入镜像中填充数据，再发送到处理器。梯形逻
辑程序把输入镜像中的数据放置在处理器的控制器标签（Controller Tags）中。模块的输
入镜像是250个字。这个大型数据区让数据在模块和处理器之间快速的交换。
需要传送到模块的数据被处理器插放到模块的输出镜像。模块程序会把这些数据提取出
来，放置在模块的内部数据库。模块的输出镜像共有248个字。这个大型数据区让数据在
模块和处理器之间快速的交换
MVI56E-MCM/MCMXT
使用MVI56E增强型Modbus主站/从站通信模块，罗克韦尔自动化®ControlLogix®处理器可以轻松连接采用RTU/ASCII串行通信协议的设备。
MVI56E-MCM和MVI56E-MCMXT作为ControlLogix背板上的输入/输出模块，使得Modbus数据对于处理器来说就像是I/O数据。与处理器进行的数据传输与Modbus网络上的通信异步。模块具备两个可独立配置的串行端口，可运行在相同或不同的Modbus网络中。每个端口都可配置为Modbus主站或从站，共享同一个由用户控制的10000字数据库。
两个模块在功能上完全相同。MVI56E-MCM用于标准过程应用项目。MVI56E-MCMXT用于Logix-XT™控制平台，可工作在极端环境中。它能耐受更高的工作温度，并且具备在严苛或腐蚀条件下提供保护的敷形涂层。
>>>>>型号:MVI56-MCM 主站/从站通信模块 串行通信协议的设备
【英文介绍】
The MVI56-MCM module is unique in its use of the ControlLogix backplane. Through the backplane, the module uses itself
The input and output mirrors in a paging manner, receiving data and sending data to the processor. The frequency of image refresh depends on
The scheduled scan rate defined by the user for the module and the communication load of the module. Typical refresh
The frequency is between 2 and 10 milliseconds.
Bidirectional data transfer is implemented in such a way that the module fills the data in its input image and sends it to the processor. Trapezoidal logic
The assembler places the data in the input image in the Controller Tags of the processor. Module output
It's like 250 words. This large data area allows data to be exchanged quickly between modules and processors.
The data that needs to be sent to the module is plugged into the output image of the module by the processor. The module program will extract the data
To place in the module's internal database. The output image of the module contains 248 characters. This large data area keeps the data in
Fast exchange between modules and processors
MVI56E-MCM/MCMXT
With the MVI56E Enhanced Modbus master/Slave communication module, Rockwell Automation ®ControlLogix® processors can easily connect devices using the RTU/ASCII serial communication protocol.
The MVI56E-MCM and MVI56E-MCMXT act as input/output modules on the ControlLogix backplane, making Modbus data look like I/O data to the processor. The data transfer with the processor is asynchronous with the communication on the Modbus network. The module has two independently configurable serial ports that can operate in the same or different Modbus networks. Each port can be configured as a Modbus master or slave, sharing the same user-controlled 10,000-word database.
The two modules are functionally identical. The MVI56E-MCM is used for standard process application projects. The MVI56E-MCMXT is used in the Logix-XT™ control platform to operate in extreme environments. It withstands higher operating temperatures and has a form coating that provides protection under harsh or corrosive conditions.
>>>>>型号:MVI56-MCM 主站/从站通信模块 串行通信协议的设备
