When you start working with any PLC equipment of any manufactures, you might wonder why there are so many types of them? Aren’t you?
This is simple, each product line will fit in with different application objectives (if its model is not productive, its manufacturer will immediately exclude it. Otherwise they will also improve it.)
In my point, there are three general types:
1. Simple sequential logic:
This product line is suitable for applications that simply need to control logic and timing (eg star start or triangular start, …), so the number of IO is not much, The program’s memory is small, the number of operations is also not complicated, …
Here’re some brand’s manufactures
– Koyo: CLICK product line
– Siemens: Logo product line
– Omron: Zen line
– Schneider-Tèle: Zelio product line
2. Compact product line:
The product line name speaks to its characteristics: It includes the full source, CPU, IO to set up the application. The characteristics of this line is that although the IO number is small but the power of the control is very great: program memory is large, number of rich programming support, …
Some names sp:
– Koyo: product line DL-05, DL-06, DL-105
– Siemens: S7-200 product line
– Mitsubishi: FX product line
– Schneider-Tèle: Twido product line
3. Product line module:
This product line is intended for use with large and large IO applications. To use this type, you must select all frequencies for the application, basically the rack (or base), source module, CPU, IO module, terminal, …
This line is very flexible, the number of IO does not mean that the application will be complicated, so the CPU of this line divided into many types and memory power as well as computing power is also different (weak As strong as Hecquin is)
Some product names:
– Koyo: product line DL-205, DL-305, DL-405
– Siemens: S7-300, S7-400 product line
– Mitsubishi: A-series, Q-series, …
