1794-OB8
1794-OB8
1794-OB8
用PLC实现电子钟的硬件接口电路如图1所示。图中PLC采用三菱FX2－40MR，显示器采用七段LED显示器，共接入两组共8位，其中组（上面）4位用来表示小时、分,从左至右分别表示月的十位、月的个位、日的十位、日的个位。采用BCD码驱动器CD4511把PLC输出的月、日、时、分等显示BCD码变换成对应的显示器所要求的7段驱动信号。由于显示位数较多，故显示采用动态显示方式，PLC的输出类型为晶体管源输出（正逻辑），其中输出端子Y0～Y3输出组显示器的BCD信号，Y10～Y13输出第二组显示器的BCD信号，Y4～Y7依次为各组显示器的选通信号。图中秒信号输出为1Hz方波，可作秒点∶闪动信号，与电子手表中的秒点闪动相同，表示在走时；图中的时信号输出为一脉冲，表示整点小时时刻到的定时脉冲信号，可作控制用，如每小时放一次音乐控制。
＆ 公司全称 ： 厦门泰尼电气有限公司
＆ 销售代表 ： 小黄
＆ 洽谈电话 ：
＆手机：
＆ 商务 QQ ： 2917675397
＆ 传真（FAX)： （请注明，01006收）
＆ 公司地址 ： 厦门市海沧区海沧街道滨湖一里7号
＆ 公司网址 ： www.xmtaini.com
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