Siemens 6GK5204-2BB10-2AA3 SIMATIC NET SCALANCE X204-2 IE Managed Switch

The daily maintenance and maintenance of the PLC is relatively simple, mainly replacing the fuse and lithium battery, and there are basically no other vulnerable components. As the random access memory (RAM), counters and auxiliary relays with retention functions for storing user programs are protected by lithium batteries, the life of the lithium battery is about 5 years. When the voltage of the lithium battery gradually decreases to a certain extent, the PLC basic unit When the battery voltage drops until the indicator light is on, it reminds the user that the program supported by the lithium battery can be kept for about a week, and the battery must be replaced. This is the main content of daily maintenance.

The steps to exchange lithium batteries are:

■Before disassembly and assembly, the PLC should be energized for more than 15 seconds (this can charge the capacitor as a memory backup power source. After the lithium battery is disconnected, the capacitor can provide short-term power supply to the PLC to protect the information in the RAM from being lost. );

■ Disconnect the AC power supply of the PLC;

■Open the battery cover of the basic unit;

■Remove the old battery and install the new battery;

■Close the battery cover.

Note that the battery replacement time should be as short as possible, generally not more than 3 minutes. If the time is too long, the program in RAM will disappear.

In addition, it should be noted that the specified model of product should be used when replacing the fuse.

Programmable controllers produced by SIEMENS in Germany are also used in similar applications.It is widely used in metallurgy, chemical industry, printing production line and other fields. Siemens (SIEMENS) PLC products include LOGO, S7-200, S7-1200, S7-300, S7-400, etc. Siemens S7 series PLC is small, fast, standardized, with network communication capabilities, stronger functions, and high reliability. S7 series PLC products can be divided into micro PLC (such as S7-200), small-scale performance requirements PLC (such as S7-300) and medium and high performance requirements PLC (such as S7-400), etc.