PPI is a protocol specifically for 200, USB is also a communication protocol, and RS485 is the physical layer definition of the interface.
Tag: S7-200
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.
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.
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.
Is the RS232/PPI and PC/PPI cable of the Siemens S7-200 PLC the same cable?
RS232/PPI and PC/PPI
Is the same cable
There are two kinds of PC/PPI cables: USB/PPI and RS232/PPI.
Because the S7200 CPU uses RS485, and the COM port of the PC is usually RS232, the electrical specifications of the two are not compatible, and the intermediate circuit is needed for matching. RS232/PPI, just RS232 and RS485 conversion, there are also USB and RS485 conversion cables
Siemens PLCS7-200, programming line PPI can be used with USB interface
PPI programming cable, also known as the programming adapter, useful computer COM port, but also useful computer usb port.
What connect is to say, the usb port that converts computer is COM port, have this to turn a wire, mount drive to go, basically be aimed at notebook computer a lot of did not yo COM port is used. The two ends of the adapter are USB port and COM port respectively. And then using this line COM port, the adapter that connects to PPI’s COM port, program 200.
U port adapter, without anything, its own end is a USB port, directly connected to the computer on the line. The other end is the COM port, 9 true D head, connected to PLC.
Programming software is to choose COM port or USB port.
PLC Cable 