Differences between S7_-200 and S7-200 SMART
First, the types of PLC are abundant and more choices are made.
The number of points on the main body of the PLC is more than that of the S7-200 PLC. The same project can satisfy the requirement by choosing a S7-200 smart PLC alone if it can not meet the requirement.
2. Expansion of Selection and Accurate Location
Compared with the corresponding S7-200 PLC, S7-200 smart PLC has the expansion function of signal board. The expansion of signal board can bring two advantages.
Advantage 1. Save the space of the control cabinet, because it expands on the body of PLC and does not expand on the side, so it can reduce the space of the control cabinet.
Advantage 2. It is selective for expansion. For example, only one analog output is needed in the project. The expansion signal board can be chosen instead of the expansion module, which can save both cost and space.
3. High-speed chips with excellent performance
Its performance is that the operation speed of the PLC is fast, and the PLC is just like our computer. Everyone likes to use the fast operation speed. It's like you open a software, a computer with fast operation speed, and it opens at a click, while the slow one, maybe you need to wait half a day to open it. So the principle is the same as that of the PLC, S7-200 smart. The operation speed of PLC is one third faster than that of S7-200 PLC. The most obvious manifestation is the self-tuning function of the PID, S7-200 PLC may take half an hour to complete the work, S7-200 smart may take only three or four minutes to complete.
4. Ethernet interconnection, economical and convenient
Using Ethernet download program can not only save the cost of purchasing Siemens special programming cable, but also make the download line very convenient. At the same time, the download speed is fast. It's like using a common network to download a movie and using optical fiber network to download a movie. It can be imagined that there is a difference in the speed between them.
5. Three-axis pulse and free movement
Usually people say that the PLC that can hear can control several axes, in which several axes are the pulses that the PLC can send out to control the servo or step. One axle means that one servo or step can be controlled. For S7-200 PLC, only two servos or steps can be controlled at most, but for S7-200 smart PLC, the pulse can be used to control the servo or step. Three servos or steps can be controlled. So if you need to control three steps or servos, choosing S7-200 smart PLC can save you money.
6. General SD Card for Easy Download
A big difference between S7-200 and S7-200 is that S7-200 requires special cards, while S7-200 smart can use SD cards on the market or in our mobile phones. It can be used to download programs, update hardware, or initialize PLC. When the system is maintained or upgraded, an SD card can be made directly to upgrade the system directly to the customer. In addition, you can use the card to upgrade the firmware of the PLC to avoid the upgrade process.
7. Software friendliness and efficient programming
Compared with S7-200 PLC, the software has greatly improved. It can be said that it has entered a color world from a black-and-white world. At the same time, it can adjust the position of each function in the software by dragging. This point corresponds to S7-200 PLC programming software is not achievable.
8. Perfect integration and seamless connection
For all Siemens products, a seamless connection can be made, and many functions can be well configured in the software, such as smart line touch screen connection, or Siemens V20 converter connection, which brings great convenience.
