DI3201 DI3201-A-V001

DI3201 DI3201-A-V001的工作方式為掃描加中斷，這既可保證它能有序地工作，避免繼電控制系統(tǒng)常出現(xiàn)的"冒險(xiǎn)競(jìng)爭(zhēng)"，其控制結(jié)果總是確定的；而且又能應(yīng)急處理急于處理的控制，保證了DI3201 DI3201-A-V001對(duì)應(yīng)急情況的及時(shí)響應(yīng)，使PLC能可靠地工作。

為監(jiān)控PLC運(yùn)行程序是否正常，DI3201 DI3201-A-V001系統(tǒng)都設(shè)置了"看門狗"（Watchingdog）監(jiān)控程序。運(yùn)行用戶程序開(kāi)始時(shí)，先清"看門狗"定時(shí)器，并開(kāi)始計(jì)時(shí)。當(dāng)用戶程序一個(gè)循環(huán)運(yùn)行完了，則查看定時(shí)器的計(jì)時(shí)值。若超時(shí)（一般不超過(guò)100ms），則報(bào)警。嚴(yán)重超時(shí)，還可使PLC停止工作。用戶可依報(bào)警信號(hào)采取相應(yīng)的應(yīng)急措施。定時(shí)器的計(jì)時(shí)值若不超時(shí)，則重復(fù)起始的過(guò)程，DI3201 DI3201-A-V001將正常工作。顯然，有了這個(gè)"看門狗"監(jiān)控程序，可保證DI3201 DI3201-A-V001用戶程序的正常運(yùn)行，可避免出現(xiàn)"死循環(huán)"而影響其工作的可靠性。

DI3201 DI3201-A-V001還有很多防止及檢測(cè)故障的指令，以產(chǎn)生各重要模塊工作正常與否的提示信號(hào)?？赏ㄟ^(guò)編制相應(yīng)的用戶程序，對(duì)DI3201 DI3201-A-V001的工作狀況，以及PLC所控制的系統(tǒng)進(jìn)行監(jiān)控，以確保其可靠工作。DI3201 DI3201-A-V001每次上電后，還都要運(yùn)行自檢程序及對(duì)系統(tǒng)進(jìn)行初始化。這是系統(tǒng)程序配置了的，用戶可不干預(yù)。出現(xiàn)故障時(shí)有相應(yīng)的出錯(cuò)信號(hào)提示。

The working mode of DI3201 DI3201-A-V001 is scanning and interruption, which can ensure that it can work orderly and avoid the "risk competition" often occurred in relay control system, and its control result is always determined; Moreover, it can control the emergency treatment, ensure the timely response of PLC to the emergency situation, and make the PLC work reliably.

In order to monitor whether the PLC operation program is normal, The DI3201 DI3201-A-V001 system is equipped with a "watchdog" monitoring program. When running the user program, first b the "watchdog" timer and start timing. When the user program runs a cycle, check the timing value of the timer. If it times out (generally no more than 100ms), it will give an alarm. Serious timeout can also stop the DI3201 DI3201-A-V001. The user can take corresponding emergency measures according to the alarm signal. If the timer does not time out, repeat the starting process and the PLC will work normally. Obviously, with this "watchdog" monitoring program, the normal operation of the PLC user program can be guaranteed and the "dead cycle" can be avoided And affect the reliability of its work.