Number of Connections The S7-200 SMART CPU can connect to Siemens HMI devices that support the PPI protocol through the integrated RS485 port or signal board, or connect to Siemens HMI devices that support the S7 protocol through the integrated Ethernet port. When the CPU’s three physical interfaces are connected to Siemens HMI devices (including … Read more
Many people are often confused by the proprietary terms in mobile phone specifications when purchasing a phone, not knowing what they actually mean. Today, we will unveil some common mobile phone parameter abbreviations. I hope this is useful for beginners. 1. Pixel Density Unit PPI The pixel density unit PPI, also known as image sampling … Read more
This is a question from my planet: “What language is C written in?” To ask it from another angle, it is actually: C needs to be compiled before it can run, so where does the C compiler come from? What language is it written in? If it is written in C itself, then which came … Read more