Siemens S7 300 PLC

Explanation: Two devices of the same model may have different programs. The same MMC card model only means that the hardware is the same, but the user program is not necessarily the same.

That is to say, when you have changed other MMC cards, even if the model is the same, the user program executed by the PLC is different. The parameters of the corresponding touch screen are set in the program, and the variables in the display box are also different. Therefore, the parameters of the touch screen are displayed incorrectly after the PLC and the touch screen communicate.

In general, such dangerous operations are not recommended.

Note: Generally speaking, for security purposes, you need to compare the programs in the two cards before replacing them. If it is the same, it can be replaced, otherwise it may cause the machine to fail to start or to operate indiscriminately after starting, which is dangerous.

You can use Step7 software to upload the program from the MMC card to your computer for saving. Then upload the program in another MMC card, and through the automatic comparison of the program, you can quickly check whether the program in the two cards is the same, and the differences can be seen clearly in **.

The PLC program, touch screen program, and both of them must be exactly the same in terms of electrical aspects before the MMC card can be exchanged.

The device model is the same, but the program and address in the MMC card cannot be the same, and there is definitely no data display after exchange.

It must be that the program is different, the hardware may be the same, and the program may be different.

There are roughly three ways to connect the CPU of the S7-300 to the host computer.

1. The CPU comes with a PN port, such as 315-2PN DP, this model can be directly connected to the network cable socket of the programming computer with a network cable, as for how to set up the PG PC interface, check the manual yourself.

2. The CPU does not have a PN port, but the CP module is mounted, such as the CP343-1 module mounted after 315-2DP, and it can also be directly connected to the programming machine with a network cable, but the premise is that the configuration has been done. If it is a newly installed rack and connected for the first time, you need to use a programming cable to configure it through the MPI interface of the CPU**, and then you can use a network cable.

3. The CPU does not have a PN port, and there is no CP module mounted, so you can only use the programming cable to connect to the programming machine through the MPI interface.

The process image size for the S7-1200 is 1024 bytes input (i) and 1024 byte output (q).

The output types of the S7-1200: relay, dry contact (voltage range 5 30 V DC or 5 250 V AC), solid-state MOSFET (voltage range V DC), the above two are digital outputs, which can be controlled on and off as needed, but the output voltage cannot be adjusted.

Summary. The Siemens S7 300 model description is: 1) Compact CPU.

Includes CPU312C, 313C, 313C-PTP, 313C-2DP, 314C-PTP, and 314C-2DP. Each CPU has counting, frequency measurement, and pulse width modulation functions. Some come with a positioning function, and some come with an io.

2) Standard CPUs. Including CPU-2DP and 316-2DP. (3) Outdoor CPUs.

Including CPU312IFM, 314IFM, 314 Outdoor and 315-2DP. This model is used in harsh environments.

Siemens S7 300 model description.

The Siemens S7 300 model description is: 1) Compact CPU. Includes CPU312C, 313C, 313C-PTP, 313C-2DP, 314C-PTP, and 314C-2DP.

Each CPU has counting, frequency collapse measurement, and pulse wide keytrack modulation. Some come with a positioning function, and some come with an io. 2) Standard CPUs.

Including CPU312, Shirt Clear -2DP and 316-2DP. (3) Outdoor CPUs. Including CPU312IFM, 314IFM, 314 Outdoor and 315-2DP.

This model is used in harsh environments.

The Siemens PLCS7-200 series must also meet the needs of modern production. Generally speaking, it is possible to classify the programmable beam program controller from three angles. The first is to classify from the control scale of the programmable controller, the second is to classify from the performance of the programmable controller, and the third is to classify from the structural characteristics of the programmable controller.

The control scale can be divided into mainframe, medium, and small machines.

How to choose the specific model of S7300 control three-position five-way solenoid valve.

The diameter (DN) size is determined according to the on-site pipe inner diameter size or flow requirements.

Use S7300 to control the action of the three-position five-way solenoid valve, and the input and output should not exceed twenty, which one should be chosen.

It should be more appropriate to choose the three digits of m-type median function.