A Mitsubishi FX series PLC, model FX1S-20MT-D. So let's talk about the meaning of this model first!
FX1S is a series name of Mitsubishi PLC, which is characterized by small and compact size.
20 is the total number of input and output points of the PLC. The PLC in my hand has 12 input points (X0-X7/X10-X13) and 8 output points (Y0-Y7), totaling 20 points.
M represents the basic unit.
T indicates that the output form of PLC is transistor output type. In addition to the transistor output type, there are relay output type and thyristor output type. Seeing this, I started to think, what are the characteristics of this transistor output type? The characteristics of the transistor output type are: fast switching speed, long life, relatively small withstand voltage, which means that the overload capacity is slightly worse. Generally, small relays (and DC loads) are required to drive the load, and they are generally used in precise control and high switching frequency occasions.
D represents DC power supply, sink type input, sink type output. I can't help but ask, leak type? What is a leaky type? Sometimes only one current direction is allowed for the DC input/output loop, and the same is true for the transistor output. When connecting external devices, you need to consider the issue of polarity. The opposite of the sink type is the source type. The sink type input means that the input terminal is connected to a low level, and the source type input means that the input terminal is connected to a high level. Sink type output means that the output terminal outputs low level, and source type output means that the output terminal outputs high level. If you connect a photoelectric switch or proximity switch, you need to pay attention. Some photoelectric switches and proximity switches need to distinguish between NPN and PNP types. For sink input, select NPN type and source input select PNP type.
It seems that there are also good colleges in this PLC model!
For I have studied PLC, and I have been in touch. When I have a PLC in my hand, the first thing I want to do is not to find out the books to review, but to actually upload and download the program to try, and I am eager to get started. La!
I downloaded a programming software called GX-Works2 from the official website of Mitsubishi, and the software is already available. Then there is the hardware. Since the power supply of the PLC is DC 24V, a switching power supply is needed. The interface connecting the programming cable to the computer is the RS232 serial port, which is not available on my computer, so I found an RS232 to USB conversion interface. , You need to install the driver, download a driver for the conversion interface on its official website, and install it. Then you can connect between the computer and the PLC.
After opening the programming software, find online in the toolbar, and click PLC read in the drop-down menu, as follows:
A dialog box for PLC series selection appears, as follows:
Select FXCPU, click OK, and a large window of connection target setting appears. In the first line above, the first item from the left is the connection serial port setting, as follows:
Set up the connection method, serial port name, and transmission speed you are using. Since the driver of the conversion interface I installed on the computer is COM6, it is set to COM6 here. Click OK after setting. Return to the large window of connection target settings, and then click OK to enter the online data operation window, as follows:
Pay attention to the font color in this window. The red and pink fonts remind you that you need to set some names and the like. After setting, the font changes to blue. Select the module data and click Execute. Jump out of the reading window, as shown:
After reading, the window changes to the following:
Click Close. Return to the online data operation window and click Close.
In the upper left of the programming software window, in the project column, find the program component, open the program component, there is a program in it, and continue to open the MAIN main program, as follows:
Double-click MAIN, and the main program will be displayed in the programming window.
The above is how to upload the program in the PLC to the computer.
After uploading the program, you can monitor and simulate online. This Mitsubishi programming software is really good, no need to download simulation software or simulation software separately