1. Fault phenomenon: Plc power-on ERR light is always on, PLC does not work.
2. Reason for failure:
(1) Poor use environment causes internal MPU, memory, and even substrate oxidation corrosion, as shown in the figure:
(2) Internal MPU and memory are damaged due to electromagnetic interference, noise interference, static electricity, etc.
3. Note:
(1) Pay attention to product protection on site to avoid corrosion of water, oil or acidic liquid inside the product.
(2) The communication cable and signal cable use shielded cable and are connected reliably.
(3) Communication lines and signal lines should be routed separately from high-current power cables.
(4) PLC should be installed separately from high-power or high-frequency equipment.
(5) AC220V power supply can be connected to the input transformer with isolation transformer; DC24V power supply, please ensure that the input power of the Switching Power Supply is not shared with the power supply of high-power equipment.
Desktop style 12v and 24v series can be used in many different electronics. EMC, LVD, FCC, RoHS are available in our company. OEM and ODM are available, samples are free for testing, all our products have 2 years warranty.
Our products built with input/output overvoltage protection, input/output overcurrent protection, over temperature protection, over power protection and short circuit protection. You can send more details of this product, so that we can offer best service to you!
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Shenzhen Waweis Technology Co., Ltd. , https://www.waweis.com