1, Siemens plc product storage capacity and speed, the general storage capacity is larger, the faster the speed of Siemens PLC, the higher the price, but should be based on the size of the system to select PLC products.
2, the system scale should first determine whether the system uses PLC single machine control, or use PLC to form a network, thereby calculating PLC input and output points. The number, and when purchasing the PLC, it is necessary to leave a certain margin (10%) based on the actual number of points required.
3. Determine the load type according to whether the load on the PLC output is DC or AC, whether it is a large current or a small current, and the frequency of the PLC output point, so as to determine whether the output uses the relay output, or the transistor output, or the product. Brake output. Different loads use different output modes, which is very important for the stable operation of the system.
4, Siemens PLC quality is guaranteed, and technical support is good, after-sales service is also good, but also conducive to your product expansion and software upgrades.
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