Category: SIEMENS PLC Cable

Plc300 failed to connect to computer mpi

~ arcozhang ~ Leave a comment

Prompt that version v8.2 is instilled onyour computer, this setup cannot instill version v2.0 on top of it. . . The computer is equipped with Siemens software. After plugging in the USB cable, the SIMATIC PC Adapter USB in the device manager still displays a yellow question mark, which cannot be safe. What is the reason?

The reason for the USB adapter driver, now the STEP7 5.5 version software has its own USB communication adapter driver, but it can only be used for the original USB communication adapter of Siemens. Those cottage USB communication adapters will appear in your situation. The solution is to change the STEP7 software with a slightly lower version, such as STEP7 5.4, or manually delete the USB driver file that comes with Siemens, and then manually install the driver that comes with your USB communication adapter.

When does the Siemens plc communication use the cp5611 card?

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CP5611 card is generally used on desktop computers, supports MPI, DP-PROFIBUS and other protocols. In addition to USP-MPI, MPI-PPI, etc., the two do not support DP protocol, only PC Adapter, only support data collection. There is also a CP5512 card that can be used to support DP. Now due to the development of industrial Ethernet, the CP5611 is used less. The CP module can be used as a master station, which is the biggest difference.

Does the PLC cable of PLC200 or PLC300/400 drive usb-MPI+ need to be connected to the PLC to install the driver of its programming cable?

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The USB-PPI programming cable of the Siemens S7-200 can be used without the need to install a driver.
The MPI programming cable of the Siemens S7-300/400 needs to run the CD with the product first, install the driver, then insert the MPI programming cable, and the computer will automatically complete the installation.

Problems when installing the Siemens PLC S7-300USB/MPI programming cable driver

~ arcozhang ~ Leave a comment

Installation of Siemens PLC S7-300 USB/MPI programming cable When driving, the driver is pre-installed successfully! Plug in the device and select Auto Install in the “Found New Hardware Wizard” dialog box that pops up, ignoring the driver digital signature warning. I clicked (OK), after plugging in the USB cable, the SIMATIC PC Adapter USB still displays a yellow question mark in the device manager and cannot be installed.

 

Plug the cable first, then open the location of the driver to install, pay attention, which usB port is installed, you need to restart, close the anti-virus software

Why can’t I connect PLC and MICWIN programming software with RS232PPI cable after using NETW NETR instruction?

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When using the NETWNETR instruction, the port of the PLC is defined as the master. The PPI network is a token network. Once the primary station has a token, the primary station controls the read and write access rights of the network, and other primary stations cannot access the primary station. All MICROWIN cannot communicate properly with the PLC

USB/PPI cable

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USB/PPI cable is suitable for the Siemens S7-200 full range of PLCs. It is a programming cable that provides serial connection and RS485 signal conversion and PPI protocol conversion via USB interface.
The driver control running in the computer simulates the USB interface of the computer into a traditional serial port (commonly known as the COM port), thereby using various existing programming software, communication software, and monitoring software. The working power is taken from the USB port and is not powered by the programming port of the PLC. The two-color LED on the converter box indicates the data transmission and reception status. For industrial sites with high interference and easy to damage the communication port, opto-isolated USB/PPI+ programming cable is selected.

USBPPI1

USB/PPI cable characteristics and technical indicators:

1. Support USB/PPI operating system: Windows2000/WindowsXP (WinNT4/95/98/Me/DOS is not supported)
2. Support USB/PPI programming software version: STEP7 Micro/WIN V3.2 and above
3. Fully compatible with USB V1.1 and USB CDC V1.1 specifications
4.USB bus power supply, current consumption is about 50mA
5. Baud rate: 9.6kbps standard baud rate automatically adapts
6. Support UART data format
7. Data bits: 8
8. Stop bits: 1, 2
9. Check digit: odd/even/no parity
10. Support the maximum communication distance of 2KM (9600bps)
11. Only one USB programming cable is supported per PC

USB/PPI cable usage:

The USB/PPI programming cable needs to be installed with the USB device driver. These drivers are included on the CD that ships 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 installation is completed, the COM port corresponding to the USB/PPI programming cable will appear in the device manager of Windows. Simply select the COM port in the programming software or other application software, and the next use is the same as the traditional RS232. The port programming cable is identical. It should be noted here that the programming cable does not support the “USB” option of the local communication port setting in the programming software.

USB/PPI cable long distance communication:

The maximum communication distance between the USB/PPI programming cable and the PLC can reach 2KM (9600bps). In this case, a 120Ω termination resistor should be connected between the 3rd and 8th pins of the RS485 port of the cable (DB9 Male) to eliminate signal reflection. The PFB-G bus isolator is installed on the PLC side, and the communication line adopts a shielded twisted pair with a cross-sectional area of ​​0.22 mm2 or more. More than 2000 meters distance can be added to the bus to add RS485 repeater to extend the communication distance.