3BSE018164R1控制處理模塊
輪詢，輪詢NIS模塊將其狀態(tài)表中的信息用于輪詢目的。當(dāng)它掃描狀態(tài)表時(shí)，它會選擇已標(biāo)記為脫機(jī)或忙碌的多播消息的目標(biāo)。輪詢目標(biāo)后，NIS模塊更新其表并將相關(guān)信息轉(zhuǎn)發(fā)給其他通信模塊。INICT01 INFI-NET至計(jì)算機(jī)傳輸模塊INICT01-INFI-NET至計(jì)算機(jī)傳輸模組（ICT）提供指導(dǎo)INFI-NET-COMPUTER接口操作所需的電子設(shè)備。它通過RS-232-C串行通信端口處理與主機(jī)的所有通信。它通過I/O擴(kuò)展器總線直接與NIS模塊通信。當(dāng)通過串行端口進(jìn)行通信時(shí)，ICT模塊可以充當(dāng)數(shù)據(jù)通信設(shè)備（DCE）或數(shù)據(jù)終端設(shè)備（DTE）。終端單元（NTMF01）或模塊（NIMF01或NIMF02）上的雙列直插式搜索配置確定此計(jì)算機(jī)接口是否作為DTE或DCE運(yùn)行。ICT模塊有足夠的內(nèi)存，可以存儲多達(dá)10000個(gè)點(diǎn)定義（取決于點(diǎn)類型）。ICT模塊固件使主機(jī)能夠發(fā)出數(shù)據(jù)采集、過程監(jiān)控和控制以及系統(tǒng)功能（安全、時(shí)間和配置控制）的命令。ICT模塊維護(hù)點(diǎn)表并解釋來自主機(jī)的命令。因此，它指導(dǎo)主機(jī)和INFI-NET系統(tǒng)之間的所有交互。
ICT模塊從INFI 90模塊接收數(shù)據(jù)，然后進(jìn)行分類
并將其存儲在其數(shù)據(jù)庫中。NIS模塊從INFI-NET系統(tǒng)接收幀，并將其傳遞給ICT模塊進(jìn)行處理。然后，信通技術(shù)模塊對這些輸入數(shù)據(jù)進(jìn)行分類，存儲異常報(bào)告和輸入請求，直到主機(jī)準(zhǔn)備好接收數(shù)據(jù)。此緩沖操作允許主機(jī)完全與INFI-NET循環(huán)異步操作。當(dāng)主機(jī)準(zhǔn)備好處理更多數(shù)據(jù)時(shí)，它向ICT模塊發(fā)出一個(gè)命令，該模塊將數(shù)據(jù)作為答復(fù)轉(zhuǎn)發(fā)。INICT03 INFI-NET到計(jì)算機(jī)傳輸模塊INICT03INFI-NET-COMPUTER TRANSFER MODULE（ICT）還提供了指導(dǎo)INICI03 INFI-NET到計(jì)算機(jī)接口操作所需的電子設(shè)備。它通過IMMPI01多功能處理器接口模塊（MPI）SCSI或RS-232-C通信端口處理與主機(jī)的所有通信。當(dāng)通過RS-232-C串行端口進(jìn)行通信時(shí)，MPI模塊可以充當(dāng)數(shù)據(jù)通信設(shè)備（DCE）或數(shù)據(jù)終端設(shè)備（DTE）。終端單元（NTMP01）或終端模塊（NIMP01或NIMP02）上的跳線配置決定了該接口是否作為DTE或DCE運(yùn)行。它還通過I/O擴(kuò)展器總線與NIS模塊直接通信。
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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