UCD240A01熱電偶模塊
模塊完整性所有INFI-NET通信模塊都具有確保模塊完整性的正常INFI 90安全功能。模塊硬件檢查非法地址并監(jiān)控機(jī)器故障計(jì)時(shí)器（MFT）和I/O擴(kuò)展器總線時(shí)鐘。如果模塊檢測到非法地址，它將生成總線錯(cuò)誤并在面板LED上顯示錯(cuò)誤代碼。如果微處理器未能重置MFT計(jì)時(shí)器，則它將過期。發(fā)生這種情況時(shí)，通信模塊停止，狀態(tài)LED變?yōu)榧t色。模塊硬件還監(jiān)控I/O擴(kuò)展器總線時(shí)鐘。如果沒有時(shí)鐘信號，模塊硬件會產(chǎn)生中斷。INNIS01網(wǎng)絡(luò)接口從模塊NIS模塊用作INICT01和INICT03模塊的I/O模塊。雖然每個(gè)計(jì)算機(jī)接口使用不同的INFI-NET通信模塊，但NIS模塊與每個(gè)通信模塊的操作方式相同。本節(jié)概述了INFI-NET通信模塊的工作原理NIS模塊處理四種不同的消息類型。它們是廣播、時(shí)間同步、多播和NIS輪詢。廣播NIS模塊在向所有系統(tǒng)節(jié)點(diǎn)發(fā)送信息時(shí)生成廣播消息。通常，這些消息會宣布節(jié)點(diǎn)狀態(tài)的更改。廣播消息包括節(jié)點(diǎn)在線、節(jié)點(diǎn)離線、節(jié)點(diǎn)重啟和節(jié)點(diǎn)忙碌。
異常報(bào)告
每個(gè)INFI 90模塊為過程輸入（點(diǎn)）建立異常報(bào)告參數(shù)。異常報(bào)告參數(shù)的一些示例包括高報(bào)警限值和低報(bào)警限值、最小和最大報(bào)告時(shí)間間隔以及量程限值的變化百分比。當(dāng)一個(gè)點(diǎn)的變化超過給定參數(shù)，或報(bào)警狀態(tài)發(fā)生變化時(shí)，模塊會生成異常報(bào)告。計(jì)算機(jī)傳輸模塊（通過Controlway或模塊總線）輪詢模塊以獲取異常報(bào)告，并將異常報(bào)告打包為具有公共節(jié)點(diǎn)目的地。打包將一個(gè)目的地（或多個(gè)目的地）的所有異常報(bào)告放入一條消息（長度可變）中。NIS模塊將此消息發(fā)送到其他INFI-NET節(jié)點(diǎn)。此過程減少了所需的傳輸次數(shù)，并調(diào)整了消息大小以獲得最大的INFI-NET循環(huán)效率。異常報(bào)告可以具有以下格式的數(shù)據(jù)值：布爾、模擬、數(shù)字和狀態(tài)報(bào)告。異常報(bào)告帶有時(shí)間戳，以反映其處理順序。最大和最小報(bào)告時(shí)間參數(shù)確保為靜態(tài)或快速變化的數(shù)據(jù)生成異常報(bào)告。最小報(bào)告時(shí)間參數(shù)控制單個(gè)快速變化點(diǎn)生成的異常報(bào)告的數(shù)量。最長報(bào)告時(shí)間參數(shù)會生成定期異常報(bào)告，報(bào)告的數(shù)據(jù)項(xiàng)不會更改或更改非常緩慢。注：如果某個(gè)點(diǎn)進(jìn)入或退出報(bào)警，則忽略時(shí)間參數(shù)并立即生成異常報(bào)告
MODULE INTEGRITY
All INFI-NET communication modules have normal INFI 90 security functions that insure module integrity. The module hardware checks for illegal addresses and monitors the machine fault timer (MFT) and the I/O expander bus clock. If a module detects an illegal address, it generates a bus error and displays an error code on the faceplate LEDs. If the microprocessor fails to reset the MFT timer, it expires. When this happens, the communication module stops and the status LED turns red. Module hardware also monitors the I/O expander bus clock. If there is no clock signal, the module hardware generates an interrupt. INNIS01 NETWORK INTERFACE SLAVE MODULE The NIS module serves as an I/O module to both the INICT01 and INICT03 modules. While each computer interface uses different INFI-NET communication modules, the NIS module operates with each communication module in the same manner. This section provides an overview of INFI-NET communication module operating theory The NIS module processes four different message types. They are broadcast, time synchronization, multicast, and NIS poll. BROADCAST The NIS module generates a broadcast message when sending information to all system nodes. Typically, these messages announce changes in node status. Broadcast messages include NODE ONLINE, NODE OFFLINE, NODE RESTART and NODE BUSY.
Exception Reports
Each INFI 90 module establishes exception reporting parameters for process inputs (points). Some examples of exception report parameters are high and low alarm limits, minimum and maximum report time intervals, and percent of change in span limits. When a point changes more than a given parameter, or an alarm state changes, the module generates an exception report. The computer transfer module polls modules (via the Controlway or module bus) for exception reports, and packs the exception reports having a common node destination. Packing places all exception reports for a destination (or multiple destinations) into one message (of variable length). The NIS module sends this message to other INFI-NET nodes. This process reduces the number of transmissions required, and adjusts the message size for maximum INFI-NET loop efficiency. Exception reports can have data values in the following formats: Boolean, analog, digital and status report. Exception reports are time stamped to reflect their processing sequence. The maximum and minimum report time parameters insure that an exception report is generated for static or rapidly changing data. The minimum report time parameter controls the quantity of exception reports a single rapidly changing point generates. The maximum report time parameter generates a periodic exception report of data items that do not change or change very slowly. NOTE: If a point goes into or out of alarm, the time parameters are ignored and an exception report is generated immediately
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