Siemens s7-200 programming line USB-ppi and communication line pc-ppi need to be purchased separately. Why can’t the programming line be used directly for communication?
Overview: USB / PPI is a programming cable that provides serial connection and RS485 signal conversion and PPI protocol conversion through a USB interface. Under the control of a driver running in a computer, the USB interface of the computer is simulated into a traditional serial port (commonly known as a COM port) In order to use the existing programming software, communication software and monitoring software. The working power of this cable is taken from the USB port, and it is no longer powered by the programming port of the PLC. The two-color light-emitting diodes on the conversion box indicate the data sending and receiving status.
How to use: The USB / PPI programming cable requires USB device drivers to be used. These drivers are included on the CD-ROM sold with the product. For installation methods, please refer to the documentation on the driver CD-ROM.
After the driver installation is complete, the COM port corresponding to the USB / PPI programming cable will appear in the Windows device manager. Just select the COM port in the programming software or other application software. The next use is the same as the traditional RS232 The programming cables are exactly the same. It should be noted here that this programming cable does not support the “USB” option of the local communication port setting in the programming software.
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