3BSE018164R1控制处理模块
轮询，轮询NIS模块将其状态表中的信息用于轮询目的。当它扫描状态表时，它会选择已标记为脱机或忙碌的多播消息的目标。轮询目标后，NIS模块更新其表并将相关信息转发给其他通信模块。INICT01 INFI-NET至计算机传输模块INICT01-INFI-NET至计算机传输模组（ICT）提供指导INFI-NET-COMPUTER接口操作所需的电子设备。它通过RS-232-C串行通信端口处理与主机的所有通信。它通过I/O扩展器总线直接与NIS模块通信。当通过串行端口进行通信时，ICT模块可以充当数据通信设备（DCE）或数据终端设备（DTE）。终端单元（NTMF01）或模块（NIMF01或NIMF02）上的双列直插式搜索配置确定此计算机接口是否作为DTE或DCE运行。ICT模块有足够的内存，可以存储多达10000个点定义（取决于点类型）。ICT模块固件使主机能够发出数据采集、过程监控和控制以及系统功能（安全、时间和配置控制）的命令。ICT模块维护点表并解释来自主机的命令。因此，它指导主机和INFI-NET系统之间的所有交互。
ICT模块从INFI 90模块接收数据，然后进行分类
并将其存储在其数据库中。NIS模块从INFI-NET系统接收帧，并将其传递给ICT模块进行处理。然后，信通技术模块对这些输入数据进行分类，存储异常报告和输入请求，直到主机准备好接收数据。此缓冲操作允许主机完全与INFI-NET循环异步操作。当主机准备好处理更多数据时，它向ICT模块发出一个命令，该模块将数据作为答复转发。INICT03 INFI-NET到计算机传输模块INICT03INFI-NET-COMPUTER TRANSFER MODULE（ICT）还提供了指导INICI03 INFI-NET到计算机接口操作所需的电子设备。它通过IMMPI01多功能处理器接口模块（MPI）SCSI或RS-232-C通信端口处理与主机的所有通信。当通过RS-232-C串行端口进行通信时，MPI模块可以充当数据通信设备（DCE）或数据终端设备（DTE）。终端单元（NTMP01）或终端模块（NIMP01或NIMP02）上的跳线配置决定了该接口是否作为DTE或DCE运行。它还通过I/O扩展器总线与NIS模块直接通信。
POLLING
The NIS module uses the information in its status table for polling purposes. As it scans the status table, it picks out destinations targeted for multicast messages that have been marked off-line or busy. After polling the destination, the NIS module updates its table and forwards pertinent information to other communication modules. INICT01 INFI-NET TO COMPUTER TRANSFER MODULE The INICT01 INFI-NET to Computer Transfer Module (ICT) provides the electronics needed to direct the operation of the INFI-NET to Computer Interface. It handles all communication with the host computer through a RS-232-C serial communication port. It communicates directly with the NIS module over the I/O expander bus. When communicating through the serial port, the ICT module can act as data communication equipment (DCE) or data terminal equipment (DTE). The dipshunt configuration on the termination unit (NTMF01) or module (NIMF01 or NIMF02) determines if this computer interface operates as DTE or DCE. The ICT module has enough memory that it can store up to 10,000 point definitions (depending on point types). ICT module firmware enables the host computer to issue commands for data acquisition, process monitoring and control, and system functions (security, time and configuration control). The ICT module maintains the point table and interprets commands coming from the host computer. Thus, it directs all interaction between the host computer and the INFI-NET system.
The ICT module receives data from INFI 90 modules and then sorts
organizes, and stores it in its database. The NIS module receives frames from the INFI-NET system and passes them on to the ICT module for processing. The ICT module then sorts this incoming data, storing exception reports and incoming requests until the host computer is ready for the data. This buffering action allows the host computer to operate completely asynchronously to the INFI-NET loop. When the host is ready to process more data, it issues a command to the ICT module that forwards the data as a reply. INICT03 INFI-NET TO COMPUTER TRANSFER MODULE The INICT03 INFI-NET to Computer Transfer Module (ICT) also provides the electronics needed to direct the operation of the INICI03 INFI-NET to Computer Interface. It handles all communication with the host computer through the IMMPI01 Multi-Function Processor Interface Module (MPI) SCSI or RS-232-C communication ports. When communicating through the RS-232-C serial port, the MPI module can act as data communication equipment (DCE) or data terminal equipment (DTE). The jumper configuration on the termination unit (NTMP01) or termination module (NIMP01 or NIMP02)determines if this interface operates as DTE or DCE. It also communicates directly with the NIS module over the I/O expander bus.
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