>>>>>型號:MVI56-MCM 主站/從站通信模塊 串行通信協(xié)議的設(shè)備
【功能描述】
MVI56-MCM模塊對ControlLogix背板使用方式是非常獨(dú)特的。通過背板，模塊使用自身
的輸入和輸出鏡像以分頁的方式，接收數(shù)據(jù)和發(fā)送數(shù)據(jù)到處理器。鏡像刷新的頻率取決于
用戶為模塊定義的計劃掃描頻率（scheduled scan rate）和模塊的通訊負(fù)荷。典型的刷新
頻率在2到10毫秒之間。
雙向的數(shù)據(jù)傳送是這樣實(shí)現(xiàn)的，模塊在其輸入鏡像中填充數(shù)據(jù)，再發(fā)送到處理器。梯形邏
輯程序把輸入鏡像中的數(shù)據(jù)放置在處理器的控制器標(biāo)簽（Controller Tags）中。模塊的輸
入鏡像是250個字。這個大型數(shù)據(jù)區(qū)讓數(shù)據(jù)在模塊和處理器之間快速的交換。
需要傳送到模塊的數(shù)據(jù)被處理器插放到模塊的輸出鏡像。模塊程序會把這些數(shù)據(jù)提取出
來，放置在模塊的內(nèi)部數(shù)據(jù)庫。模塊的輸出鏡像共有248個字。這個大型數(shù)據(jù)區(qū)讓數(shù)據(jù)在
模塊和處理器之間快速的交換
MVI56E-MCM/MCMXT
使用MVI56E增強(qiáng)型Modbus主站/從站通信模塊，羅克韋爾自動化?ControlLogix?處理器可以輕松連接采用RTU/ASCII串行通信協(xié)議的設(shè)備。
MVI56E-MCM和MVI56E-MCMXT作為ControlLogix背板上的輸入/輸出模塊，使得Modbus數(shù)據(jù)對于處理器來說就像是I/O數(shù)據(jù)。與處理器進(jìn)行的數(shù)據(jù)傳輸與Modbus網(wǎng)絡(luò)上的通信異步。模塊具備兩個可獨(dú)立配置的串行端口，可運(yùn)行在相同或不同的Modbus網(wǎng)絡(luò)中。每個端口都可配置為Modbus主站或從站，共享同一個由用戶控制的10000字?jǐn)?shù)據(jù)庫。
兩個模塊在功能上完全相同。MVI56E-MCM用于標(biāo)準(zhǔn)過程應(yīng)用項(xiàng)目。MVI56E-MCMXT用于Logix-XT?控制平臺，可工作在極端環(huán)境中。它能耐受更高的工作溫度，并且具備在嚴(yán)苛或腐蝕條件下提供保護(hù)的敷形涂層。
>>>>>型號:MVI56-MCM 主站/從站通信模塊 串行通信協(xié)議的設(shè)備
【英文介紹】
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.
>>>>>型號:MVI56-MCM 主站/從站通信模塊 串行通信協(xié)議的設(shè)備
