【正文】 這樣，整個進程由 Tr、 Td、 Ts 等這些參數(shù)相互傳遞著，一步步進行下去。啟動完成后，如果一切正常，則把 “正常標志 ”置位，保護器在下一個復(fù)位周期進入正常運行?？煞譃?2 種情況： ① 對于單純顯示儀表，每次復(fù)位后進行測量、送顯示，兩次復(fù)位之間沒有因果關(guān)系，只需把原來的等待改為休眠即可。 上電檢測與手動復(fù)位 成為正常運行的開始條件，無法辨別是否初上電。也就是說，正常輸出為低的引腳，會按照復(fù)位周期出現(xiàn)寬度為 Tr 的正脈沖。為了實現(xiàn)調(diào)節(jié)的電子化，可以使用電子電位器，用單片機指令設(shè)定上下限。在有些場合，休眠的時間會很長，對提高抗干擾能力非常有效。 ② 由于每 1s 無條件復(fù)位 1 次，一旦某次工作期間出現(xiàn)死機，在下次復(fù)位時肯定得以恢復(fù)。用此方 法較好地解決了上述問題，并在農(nóng)用變壓器綜合保護器實驗中得到了較好的效果。 Write a part of the procedure of the software according to this movement, such as Fig. 5. In 4 Fig, act as person who protect the beginning at the electricity, is it transmit power 0 to try at first. 5s, points out and transmits power soon。 After the high level, the onechip puter begins to hold the conduct procedure. That is to say, are restored to the throne and suitable for the time that the procedure carries out during the low level Td of the signal, this time should be greater than the execution cycle of the procedure each time. It is restore to the throne cycle and restore to the throne high level of signal take empty than very much important to choose rationally. As to simple to show instrument, restore to the throne cycle determine data break cycle, low electricity is it measure, hancl over all time shown to greater than to want at ordinary times。s circuit etc, can make this problem havebetter settlement, but still the existing problem: ① Guard the gate dog at the movement, mean and appear mistake already and run some time, this is not allowed in some occasions。 ② Procedure appear circulation mistake very much sometimes, but just guard the gate dog control link include and enter, adopt and guard the gate as to such a mistake dog unable to discern。 Otherwise, cant present forever the mistake of the intact executive integrated circuit in Ts and Tr period all can effectively the antijamming, but is best the unnecessary time arrangement in Tr. When the program time is long, when as far as possible the request reduces Tr, may join the differentiating circuit, like chart 1 center C30, R26, D9. Treatment of output end sons (1) Restore to the throne straight pulse During all I/O mouth of onechip puter turn into the high level when restoring to the throne. That is to say output for low pin normally, will according to restore to the throne cycle appear the width for the straight pulse of Tr. This straight pulse will influence the normal output, 2 methods are dealt with: ① Connect in parallel electric capacity suppress , capacity confirm according to Tr time that restore to the throne on the son in end. Reducing Tr can be reduced and connected the electric capacity in parallel. ② It is invalid to design the peripheral circuit into the high level. (2) Faulttolerant Choose the capacity that the output end connects the electric capacity in parallel faulttolerantly and properly, can realize faulttolerant control. Reduced cycle in a certain, because interfered exporting the wrong level. Because the keeping function of electric capacity, can39。 Transmit power formally after waiting for 30s. It is startup time in 1s after transmitting power, does not measure the electric current. Start after finishing, if all going well, the location is put normal sign , person who protect restore to the throne cycle enter normal running in the next one. Try 0 that transmits power. 5s is it is it realize to count once restoring to the throne to delay time, restore to the throne time 20ms each time. At having electricity for the first time, make all zero clearing to inside RAM, make it is it time Ts to transmit power not to try =Dormancy after 25. After restoring to the throne, is it have electric pin to have electricity for the first time already, is it is it is it is it time the measuring of Ts to transmit power to try to get to go on to measure next time. If Ts * 0, is it in is it prolong period to transmit power, is it enter dormancy after the 1 to reduce Ts to prove. Act as Ts1 = 0, the course which waited for 30s that