PPI is a protocol specifically for 200, USB is also a communication protocol, and RS485 is the physical layer definition of the interface.
Category: SIEMENS PLC Cable
Siemens wincc connects to the S7-200 through PC Access, using a USB-PPI cable
To import variables into wincc. PC access first establishes a connection with the PLC, then PC access and wincc establish OPC communication, and import the variables of PC access.
How does the Siemens S7-200 CPU222 communicate with the PC/PPI communication cable?
Switch the PLC to “STOP” and connect the communication cable. Open the PLC software, select “Set PC/PG interface” in the lower left corner, open it, select PC/PPI in the list on the left, click the property on the right side, in the property menu that opens, under the PPI option, fill in the address “0” , timeout 1S, advanced PPI and multi-master network to remove the check, the transmission rate is set to 9.6KB / S, the highest address 31, and then switch to “local connection”, according to your communication cable, if it is a USB interface, select SUB If it is a serial port (it is recommended to use Siemens official PC/PPI cable), select COM1 and confirm to exit;
Then select the communication, open the window, check all the baud rates in the lower left corner to search for the PLC you are connected to.
Siemens s7-200, usb-ppi communication steps
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.
2. Open the programming software and set the PC/PG interface and select USB.
3. The computer and PLC are connected to upload/download programs via USB/PPI cable.
How to use the usb-ppi cable to establish communication between the computer and the s7-200
Upload/Download S7-200PLC via USB/PPI cable Procedure: Hardware: Computer with STEP7MicroWIN programming software, S7-200PLC, USB/PPI cable.
2. Open the programming software and set the PC/PG interface to select USB3. Connect the computer to the PLC via the USB/PPI cable to upload/download the program.
S7-200 usb-ppi+ communication cannot read PLC information, display unknown number
Showing unknow is a problem with your programming line.
In fact, the software has found the PLC, the site: 1, the baud rate is 9.6kbps.
Your PLC site needs to be set to 1 (manually input or click to display the location of “unknow, 1, .96bps” is automatically set).
Driver for S7-200 USB-PPI programming cable
The interface of Siemens PLC is RS485, so why not use USB-485 cable directly, but use USB-PPI and USB-MPI cable?
1. PPI cable can be converted with a simple RS232-RS485 interface, but cannot meet the high-speed communication of 187.5K.
2. There is a protocol chip in the MPI programming cable, which cannot be converted using a simple RS232-RS485 interface.
3. Many people always bite RS485. In fact, it is two things, one is physical, and PPI and MPI are on the agreement.
What is a PC/PPI programming cable
The S7200 CPU uses RS485, and the COM port of the PC uses RS232. The electrical specifications of the two are not consistent and need to be matched by the intermediate circuit. PC/PPI is indeed a matching cable of RS485/RS232.
What is the meaning of PPI for “PPI cable” in PLC knowledge?
Point-to-point communication, communication supported by the Siemens S7-200 CPU.
In the Siemens S7-300 CPU, multipoint communication MPI (Multi-Point Interface) is often used.
What is the difference between Siemens programming cable USB-PPI and RS232-PPI?
One end of the USB-PPI is a nine-pin head connected to the PPI/MPI interface of the PLC, and the other end is a USB, and a Siemens driver is required. Usually after installing the software such as STEP7.
One end of the Rs232-PPI is connected to the PLC, and the other end is the port of RS232.
Is PC-PPI suitable for Siemens S7-200 driver software?
No need
If the USB PPI cable is required, the driver needs to be installed.
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