RELIANCE 0-57C401-2时刻继电器在工业操控中运用十分广泛，品种比照多。传统的时刻继电器有：空气压缩延时、电子线路延时等办法作成。守时精度低、设定参数不直观。用MEAPC替代时刻继电器，电路十分简略、时刻设置活络。在MAEPC中有三条守时指令RELIANCE 0-57C401-2，它们是由单片机内晶振分频得到精度高。在需求长守不时，可经过R0~R15寄存器协作完毕。
现介绍一种可活络装备延不时刻，两路输出的电子时刻继电器。
6．1时刻继电器的硬件电路MEAPC的P1~P8口联接一个8位DIP拨码开关，延不时刻分红256档；P9、P10操控两个继电器；P11、P12、P13做外部触发条件输入端。J1是刹那间动作继电器吸合100ms往后开释；J2长吸合继电器。
 
将8位拨码开关的二进制值读入内部R0寄存器，再依据实习需求预置守时初值。假设守时初值为：1s，则最长可延时256秒。程序清单：。。。。。。IN P8LRP ; P8左移到R0寄存器IN P7LRPIN P6LRPIN P5LRPIN P4LRPIN P3LRPIN P2LRPIN P1 ;读入8位拨码开关的值到R0寄存器B0：B0 1S ；延时初值1SDEC R0 JR0 ；R0=0 跳行JMP B0；延不时刻到J1、J2动作CLR P9CLR P10 

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