西门子触摸屏加密后，如果没有密码就不能再使用了吗

SmartLine恢复出厂步骤：
https://www.ad.siemens.com.cn/productportal/prods/hmi/smartlinesv3faq/smartpanels13_3.html#:~:text=%E4%B8%8A%E9%BB%91%E5%B1%8F%E5%87%A0%E7%A7%92%E9%92%9F%EF%BC%8C%E4%B9%8B%E5%90%8E%E8%BF%9B%E5%85%A5%E6%81%A2%E5%A4%8D%E5%87%BA%E5%8E%82%E8%AE%BE%E7%BD%AE%E7%95%8C%E9%9D%A2%EF%BC%8C%E5%9C%A8%E8%AF%A5%E7%95%8C%E9%9D%A2%E4%BC%9A%E6%98%BE%E7%A4%BA%E8%A6%81%E6%81%A2%E5%A4%8D%E7%9A%84%E9%95%9C%E5%83%8F%E7%89%88%E6%9C%AC%E5%8F%B7%EF%BC%8C%E5%A6%82%E4%B8%8B%E5%9B%BE%20.%205.%E7%82%B9%E5%87%BB%E5%9B%BE%E4%B8%AD%E5%B7%A6%E4%B8%8B%E8%A7%92%E2%80%9CSTART,RECOVERY%E2%80%9D%E6%8C%89%E9%92%AE%E4%B8%89%E6%AC%A1%E5%90%8E%E5%BC%80%E5%A7%8B%E6%81%A2%E5%A4%8D%E5%87%BA%E5%8E%82%E8%AE%BE%E7%BD%AE%EF%BC%8C%E5%A6%82%E4%B8%8B%E5%9B%BE.%206.%E7%AD%89%E5%BE%85%E8%BF%9B%E5%BA%A6%E6%9D%A1%E8%BF%9B%E5%85%A5%E5%88%B0100%25%E5%90%8E%EF%BC%8C%E7%A7%BB%E9%99%A4U%E7%9B%98%EF%BC%8C%E7%82%B9%E5%87%BB%E5%8F%B3%E4%B8%8B%E8%A7%92%E2%80%9CREBOOT%E2%80%9D%E6%8C%89%E9%92%AE%EF%BC%8C%E8%A7%A6%E6%91%B8%E5%B1%8F%E5%B0%86%E9%87%8D%E5%90%AF%E8%BF%9B%E5%85%A5%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F%E3%80%82%20%E6%AD%A4%E6%81%A2%E5%A4%8D%E5%87%BA%E5%8E%82%E8%AE%BE%E7%BD%AE%E6%88%90%E5%8A%9F%E3%80%82%20%E7%AC%AC%E5%9B%9B%E4%BB%A3%E7%B2%BE%E5%BD%A9%E9%9D%A2%E6%9D%BF%E6%81%A2%E5%A4%8D%E5%87%BA%E5%8E%82%E8%AE%BE%E7%BD%AE%E6%AD%A5%E9%AA%A4%E5%92%8C%E7%AC%AC%E4%B8%89%E4%BB%A3%E4%BA%A7%E5%93%81%E6%81%A2%E5%A4%8D%E5%87%BA%E5%8E%82%E8%AE%BE%E7%BD%AE%E7%9A%84%E6%AD%A5%E9%AA%A4%E7%9B%B8%E5%90%8C%EF%BC%8C%E4%B9%9F%E5%8F%AF%E5%8F%82%E8%80%83%E5%A6%82%E4%B8%8B%E8%B5%84%E6%96%99%E3%80%82

Good Luck~

V3和V4操作步骤相同。

Good Luck~

400几十元的触摸屏
量大还便宜。

smart的PLC输入端是用NPN还是PNP，取决于接M点的是24V+还是24V-，两种都是可以用的，只是一个模块的输入种类只能用一种！

还有这种说法哈！第一次听说，是我孤陋寡闻了！

plc  npn  pnp都可以接