产品内容介绍
GE 228B3156G2输出控制器
模块和处理器之间通过背板传输的所有数据
通过输入和输出图像。梯形逻辑必须写入ControlLogix处理器将输入和输出图像数据与控制器中定义的数据进行接口标签。模块使用的所有数据都存储在其内部数据库中。此数据库是
定义为一个地址从0到4999的数据表，模块的内部数据库结构此数据库中包含的数据通过输入和输出图像。ControlLogix梯形图逻辑和MVI56E-SIE模块的程序工作共同协调这些块传输。最多可以传输200字的数据从模块到处理器（读取块-输入图像）或从处理器到每个块传输中的模块（写块-输出图像）。
每个模块的块结构块类型取决于块的数据内容和功能。模块使用以下块标识号：块ID范围描述-1个空块
0此功能增强了性能，尤其是在使用小于200字读/写数据：
如果在模块配置文件中设置了读取寄存器计数>200字，块ID 0未使用。
如果模块配置文件中的读取寄存器计数设置为>0
且<=200个字，块ID包含与块1相同的数据（读取数据和状态数据）。读取块ID是一个索引值，用于确定200字数据的位置模块内存中的ControlLogix处理器。每次传输最多可以移动200个字（块偏移量2到201）的数据。除了移动用户数据外，块还包含单元与块关联的写块ID从ControlLogix处理器。
在正常程序操作期间，模块顺序发送读取块和请求写入块。
例如，如果应用程序使用三个读块和两个写块，序列将具体如下：
R1W1>R2W2>R3W1>R1W2>R2 W1>R 3W2>R1W1
此序列将继续，直到被控制器或通过西门子工业以太网上的节点发出的命令请求通过模块的配置/调试端口进行网络或操作员控制。该字中的每一位启用/禁用命令对于客户端0。如果设置了位，命令将处决如果该位清除，则命令将为残废此数据在输出图像中设置（WriteBlock）。这19个单词分别用于其他19个单词
模块中的客户端。此数据在输出中设置梯形图逻辑中的映像（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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