1. Try to move the CPU to the STOP position. 2. Close all software, especially those that use the communication port. Only keep the 200PLC programming software running. 3. To communicate properly with Siemens' latest S7-200 CN CPU, ensure you are using STEP 7-Micro/WIN V4.0 SP3 or later and set the working environment to Chinese. If these conditions aren't met, an error number 82 may occur during download. If the issue persists, check other potential causes. 4. Use the original USB/PPI cable and update the programming software to the latest version. For non-original USB cables, make sure to select the correct COM port (check via Computer - Properties - Hardware - Device Manager - Ports). 5. Why is there an asterisk before the COM port symbol in PG/PC communication properties? The asterisk indicates that the port is occupied by another program. Micro/WIN cannot use it. For more details, refer to the main steps of checking programming communication. 6. If communication is established but not normal, check items 1–4. If no communication at all, check all items: - Ensure STEP 7-Micro/WIN is fully compatible with your Windows OS. - Verify that you're using the original Siemens programming cable and that it meets the hardware requirements of your PC or laptop. - Check the COM port settings on your programming computer. Right-click "My Computer," go to Properties > Device Manager > Ports (COM & LPT), double-click the used port (e.g., COM1), and adjust the receive/send buffer to minimum. Keep the FIFO selection and restart your computer for the changes to take effect. - Check the DIP switch settings on the programming cable to match the communication rate in Micro/WIN. Click the "Communication" button on the left navigation bar and verify the settings. You can also adjust the PC/PPI cable properties by double-clicking its icon. The default CPU setting is communication port address 2 and baud rate 9.6K. For new SMART RS-232/PPI cables used with Micro/WIN32 V3.2 SP4 or higher, set DIP switch 5 to 1 and enable "search all baud rates" to detect devices on the network. Standard cables only support up to 19.2K, so if the CPU is set to 187.5K, it won’t be found. - If still not working, measure the DC power output voltage of the sensor in the lower right corner of the CPU (L+/M). It should be above 22V. - Use wipeout.exe to restore the CPU to factory settings. By default, the communication port address is 2 and the baud rate is 9.6K.
Features
1. Lower Temperature Coefficient: PERC solar panels have a lower temperature coefficient, meaning they produce more power at higher temperatures compared to conventional panels.
2. Aesthetics: Some PERC panels are designed with black frames and glass, giving them a sleek appearance that blends well with modern architectural designs.
3. Cost: While PERC panels offer superior performance, they generally come at a higher cost compared to other types of solar panels. However, the increased efficiency can lead to a quicker return on investment over the lifetime of the system.
Applications
PERC mono solar cells find applications in a wide range of sectors, from residential rooftop installations to large-scale power plants. Their high efficiency and durability make them particularly suitable for areas with limited space or where high performance is critical. Additionally, they are increasingly being used in remote areas where grid connectivity is not available, providing reliable off-grid power solutions.
To summarize, SunPower monocrystalline solar panels exemplify continuous advancements in solar technology, showcasing a harmonious blend of high efficiency, robustness, and cost-efficiency that positions them as an advantageous selection for global solar energy initiatives, whether they be commercial or residential in nature.
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Ningbo Taiye Technology Co., Ltd. , https://www.tysolarpower.com