used to connect the output data line of Siemens PLC is RS485 interface
Tag: plc
“Siemens 200 PLC data line selection” problem?
PC/PPI programming cable, RS-232/PPI multi-master programming cable and USB/PPI multi-master programming cable What are the differences between the three S7200PLC data cable models, what is PPI, what is multi-master programming
The Siemens S7-200 programming communication cable is divided into two types:
Programming communication cable, PC/PPI, RS232/485 conversion, with optical isolation, maximum 187.5K baud rate, support for multiple master stations;
Programming communication cable, PC/PPI, USB/RS485 conversion, with optical isolation, maximum 187.5K baud rate, support for multiple master stations;
The order numbers are 6ES7901-3CB30-0XA0, 6ES7901-3DB30-0XA0
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 can not meet the high-speed communication of 187.5K.
2. There is a protocol chip inside the MPI programming cable, which cannot be converted using a simple RS232-RS485 interface.
3. In fact, it is two things, one is physical, and PPI and MPI are on the agreement.
What is the difference between Siemens programming cable and USB-PPI and RS232-PPI?
The interface is different.
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 RS232 port. Generally, the notebook does not have a desktop machine.
However, if you take the PLC of 200, it seems that my classmates use RS232 and then switch to the USB connector, and can connect after installing the driver.
The difference between Siemens s7-200 programming line USB-ppi and communication line pc-ppi
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 provides serial connection and RS485 signal conversion and PPI protocol conversion via USB interface. The programming cable emulates the computer’s USB interface as a traditional serial port (commonly referred to as a COM port) under the control of a drive running in the computer, using a variety of existing programming software, communication software, and monitoring software. The working power of this cable is taken from the USB port and is no longer powered by the programming port of the PLC. The two-color LED on the converter box indicates the data transmission and reception status.
How to use: The USB / PPI programming cable needs to be installed with the USB device driver. These drivers are included on the CD-ROM that came with the product. For the installation method, please refer to the documentation on the driver CD, which will not be described here.
After the driver is installed, the COM port corresponding to the USB / PPI programming cable will appear in the Windows Device Manager. Simply select the COM port in the programming software or other application software, the next time you use the same as the traditional RS232. The port programming cable is identical. It should be noted that the programming cable does not support the “USB” option for the local communication port settings in the programming software.
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.
What is the model cable of the Mitsubishi PLC connected to the computer?
Mitsubishi PLC has Q series and FX series. The Q series is generally a USB port for printers.OR USB-QC30R2
FX series, serial port is SC-09, USB port is USB-SC-09
Mitsubishi q series plc with usb line connection or not to install the driver
Mitsubishi also needs to install the corresponding plc driver, the programming software comes with it.
The USB driver file needs to manually specify the installation path for the first time. The file is in X:\MELSOFT\GX Developer\Easysocket\USBDrivers
X represents the drive letter of the programming software installation. The most important is under the Easysock\USBDrivers path.
PLC Cable 