產(chǎn)品內(nèi)容介紹
GE 228B3156G2輸出控制器
模塊和處理器之間通過背板傳輸?shù)乃袛?shù)據(jù)
通過輸入和輸出圖像。梯形邏輯必須寫入ControlLogix處理器將輸入和輸出圖像數(shù)據(jù)與控制器中定義的數(shù)據(jù)進行接口標簽。模塊使用的所有數(shù)據(jù)都存儲在其內(nèi)部數(shù)據(jù)庫中。此數(shù)據(jù)庫是
定義為一個地址從0到4999的數(shù)據(jù)表，模塊的內(nèi)部數(shù)據(jù)庫結(jié)構此數(shù)據(jù)庫中包含的數(shù)據(jù)通過輸入和輸出圖像。ControlLogix梯形圖邏輯和MVI56E-SIE模塊的程序工作共同協(xié)調(diào)這些塊傳輸。最多可以傳輸200字的數(shù)據(jù)從模塊到處理器（讀取塊-輸入圖像）或從處理器到每個塊傳輸中的模塊（寫塊-輸出圖像）。
每個模塊的塊結(jié)構塊類型取決于塊的數(shù)據(jù)內(nèi)容和功能。模塊使用以下塊標識號：塊ID范圍描述-1個空塊
0此功能增強了性能，尤其是在使用小于200字讀/寫數(shù)據(jù)：
? 如果在模塊配置文件中設置了讀取寄存器計數(shù)>200字，塊ID 0未使用。
? 如果模塊配置文件中的讀取寄存器計數(shù)設置為>0
且<=200個字，塊ID包含與塊1相同的數(shù)據(jù)（讀取數(shù)據(jù)和狀態(tài)數(shù)據(jù)）。讀取塊ID是一個索引值，用于確定200字數(shù)據(jù)的位置模塊內(nèi)存中的ControlLogix處理器。每次傳輸最多可以移動200個字（塊偏移量2到201）的數(shù)據(jù)。除了移動用戶數(shù)據(jù)外，塊還包含單元與塊關聯(lián)的寫塊ID從ControlLogix處理器。
在正常程序操作期間，模塊順序發(fā)送讀取塊和請求寫入塊。
例如，如果應用程序使用三個讀塊和兩個寫塊，序列將具體如下：
R1W1>R2W2>R3W1>R1W2>R2 W1>R 3W2>R1W1
此序列將繼續(xù)，直到被控制器或通過西門子工業(yè)以太網(wǎng)上的節(jié)點發(fā)出的命令請求通過模塊的配置/調(diào)試端口進行網(wǎng)絡或操作員控制。該字中的每一位啟用/禁用命令對于客戶端0。如果設置了位，命令將處決如果該位清除，則命令將為殘廢此數(shù)據(jù)在輸出圖像中設置（WriteBlock）。這19個單詞分別用于其他19個單詞
模塊中的客戶端。此數(shù)據(jù)在輸出中設置梯形圖邏輯中的映像（WriteBlock）。
Module’s Internal Database Structure
All data transferred between the module and the processor over the backplane is through the input and output images. Ladder logic must be written in the ControlLogix processor to interface the input and output image data with data defined in the controller tags. All data used by the module is stored in its internal database. This database is defined as a data table with addresses from 0 to 4999
Data contained in this database is transferred in blocks, or pages, using the input and output images. ControlLogix ladder logic and the MVI56E-SIE module's program work together to coordinate these block transfers. Up to 200 words of data can be transferred from the module to the processor (read block - input image) or from the processor to the module (write block - output image) in each block transfer. The block structure of each block type depends on the data content and function of the block. The module uses the following block identification numbers: Block ID Range Descriptions -1 Null block 0 This feature enhances performance, especially when using less than 200 words of read/write data: ? If Read Register Count in the module configuration file is set > 200 words, Block ID 0 is not used. ? If Read Register Count in the module configuration file is set >0 and <= 200 words, Block ID contains the same data as block 1 (both read data and status data).
Normal Data Transfer Blocks
Normal data transfer includes the paging of user data from the module’s internal database (registers 0 to 4999), as well as paging of status data. These data are transferred through read (input image) and write (output image) blocks. The following topics describe the function and structure of each block. Read Block These blocks of data transfer information from the module to the ControlLogix processor. The following table describes the structure of the input image.The Read Block ID is an index value used to determine where the 200 words of data from module memory will be placed in the ReadData[x] controller tag array of the ControlLogix processor. Each transfer can move up to 200 words (block offsets 2 to 201) of data. In addition to moving user data, the block also contains status data for the module. The Write Block ID associated with the block requests data from the ControlLogix processor. During normal program operation, the module sequentially sends read blocks and requests write blocks. For example, if the application uses three read and two write blocks, the sequence will be as follows: R1W1>R2W2>R3W1>R1W2>R2W1>R3W2>R1W1> This sequence will continue until interrupted by other write block numbers sent by the controller or by a command request from a node on the Siemens Industrial Ethernet network or operator control through the module’s Configuration/Debug port.
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