RELIANCE 0-57C401-2時刻繼電器在工業(yè)操控中運用十分廣泛，品種比照多。傳統(tǒng)的時刻繼電器有：空氣壓縮延時、電子線路延時等辦法作成。守時精度低、設(shè)定參數(shù)不直觀。用MEAPC替代時刻繼電器，電路十分簡略、時刻設(shè)置活絡(luò)。在MAEPC中有三條守時指令RELIANCE 0-57C401-2，它們是由單片機內(nèi)晶振分頻得到精度高。在需求長守不時，可經(jīng)過R0~R15寄存器協(xié)作完畢。
現(xiàn)介紹一種可活絡(luò)裝備延不時刻，兩路輸出的電子時刻繼電器。
6．1時刻繼電器的硬件電路MEAPC的P1~P8口聯(lián)接一個8位DIP撥碼開關(guān)，延不時刻分紅256檔；P9、P10操控兩個繼電器；P11、P12、P13做外部觸發(fā)條件輸入端。J1是剎那間動作繼電器吸合100ms往后開釋；J2長吸合繼電器。
將8位撥碼開關(guān)的二進制值讀入內(nèi)部R0寄存器，再依據(jù)實習(xí)需求預(yù)置守時初值。假設(shè)守時初值為：1s，則最長可延時256秒。程序清單：。。。。。。IN P8LRP ; P8左移到R0寄存器IN P7LRPIN P6LRPIN P5LRPIN P4LRPIN P3LRPIN P2LRPIN P1 ;讀入8位撥碼開關(guān)的值到R0寄存器B0：B0 1S ；延時初值1SDEC R0 JR0 ；R0=0 跳行JMP B0；延不時刻到J1、J2動作CLR P9CLR P10
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