Tag: S7-200

What is the difference between Siemens programming cable USB-PPI and RS232-PPI?

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The interfaces of Siemens programming cables with usb-ppi and rs232-ppi are different.
Extension: Siemens programming cable for connecting Siemens PLC to computer, available in various models.

Type:

PC/TTY corresponds to Siemens product number :6ES5 734-1bd20,RS232 to Siemens S5 series PLC programming port (DB15) communication interface cable, 3m. RS232/ current loop interface for S5 series PLC programming software and monitoring system.

USB/PPIUSB interface Siemens s7-200 PLC programming cable, USB/PPI interface, 3 meters, with communication indicator light, corresponding to Siemens product number: 6ES7 901-3db30-0xa0, the maximum communication distance up to 2 kilometers.

USB/PPI+ isolation USB interface Siemens s7-200 PLC programming cable, USB/PPI isolation, 3 meters, with communication indicator light, corresponding to Siemens product number: 6ES7 901-3db30-0xa0, the maximum communication distance up to 2 kilometers.

The difference between Siemens s7-200 programming line USB-ppi and communication line pc-ppi

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The Siemens s7-200 programming line usb-ppi and the communication line pc-ppi need to be purchased separately. Why can’t the programming line be used for communication directly? Summary: USB/PPI is a programming cable that provides serial connection and RS485 signal conversion and PPI protocol conversion through USB interface. Under the control of the driver running in the computer, the USB interface of the computer is simulated into the traditional serial port (commonly known as a COM port), so as to use various existing programming software, communication software and monitoring software. The working power of this cable is taken from the USB port and no longer supplied by the PLC programming port. The two-color light-emitting diode on the conversion box indicates the sending and receiving status of data.
How to use it: USB/PPI programming cables require USB device drivers to be installed. These drivers are contained in the cd-rom that is shipped with the product. Please refer to the instructions on the driver cd-rom for the installation method.

After the driver is installed, the corresponding COM port of USB/PPI programming cable will appear in the device manager of Windows. You only need to select the COM port in the programming software or other application software, and the following use is exactly the same as the traditional RS232 programming cable. It should be noted here that this programming cable does not support the “USB” option of local communication port setting in the programming software.

How does the Siemens PLC S7-200 communicate with the computer?

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1. Just open the device manager of your computer. After installing the driver under normal conditions, a different serial port will be generated. Please write down the generated serial port, as shown below:
2, open the Siemens programming software, if your 200 series PLC is with CN, please change the software to the Chinese version, and the software version needs to be above V4.0 SP4, the above two conditions are indispensable. If it is not CN, except for these two points.
3. Click on the software and the following window appears.
4, click , the following window appears,
5. After selecting “PC/PPI cable (PPI) ”. Point attributes,
6, this step is extremely important, the port here must choose the cable to install the driver generated serial port, remember! Otherwise it is not possible to communicate. The port can be seen in the device manager.
7. Switch to the “PPI” tab. The default value of “Address” is 0. Do not check the two options for “Network parameters”. Otherwise it is not possible to communicate. The “transmission rate” can be selected according to the actual situation of the PLC.
8, after setting these up. All the way down. Then return to the communication interface, double-click “Refresh” to locate the model of the PLC, you can download the program.

Siemens s7-200, usb-ppi communication steps

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Siemens s7-200, usb-ppi communication steps:
1. Install the USB-PPI driver and look at the serial port generated in the device management. Connect the computer with STEP 7 MicroWIN programming software with S7-200PLC and USB/PPI cable.

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2. Just open the programming software and set the PC/PG interface and select USB.

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3. The computer and PLC are connected to upload/download programs via USB/PPI cable.

The communication interface of Siemens PLC is how to connect the two wires of RS485 to the 9-pin serial port?

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The difference between the parallel port and the serial port is that the way of exchanging information is different. The parallel port can transmit information through 8 data lines at the same time, one byte is transmitted at a time; and the serial port can only transmit one bit of data with one line, each time. Transfer one bit of a byte. In serial communication processing, RTS/CTS and XON/XOFF are often seen. This is the two flow control options. Currently, flow control is mainly used in modem data communication, but for ordinary RS232 programming, understand A little bit of knowledge in this area is good.

The programmable controllers produced by SIEMENS in Germany are also widely used in China, and are used in metallurgy, chemical and printing production lines. Siemens (SIEMENS) PLC products include LOGO, S7-200, S7-1200, S7-300, S7-400 and so on.

The door S7 series PLC is small in size, fast in speed, standardized, and has network communication capability, stronger function and high reliability. S7 series PLC products can be divided into micro PLC (such as S7-200), PLC with small-scale performance requirements (such as S7-300) and PLC with medium and high performance requirements (such as S7-400).

In general, programmable controllers can be classified from three perspectives. The first is to classify the size of the programmable controller from the control, the second is to classify the performance of the programmable controller, and the third is to classify the structural characteristics of the programmable controller.

Siemens PLC S7-200 and computer communication connection

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I use the same computer with the same data cable to connect with the PLC, and the PLC224CN PLC connection is normal, why not communicate with a CPU224XP PLC!？

 

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Connect to the computer to set the port. May be USB, maybe COM 2, COM3

Siemens PLC S7-200 is not connected to computer communication:

1, check if the computer has RS232 interface, the programming line and interface are not damaged
Is the USB driver installed and the port set correctly?

2, check if the USB is damaged

3. If there is no problem above, it may be that the communication frequency of the last time the program was written, and the communication frequency of this write is not the same as the communication frequency. At this time, we must use Siemens 5161 card to unlock, reset the communication frequency.

4, if there is still a problem, that is, the communication port of the PLC is damaged.