Before using H2U series PLC, please read this manual carefully in order to use the products correctly. This manual mainly describes specifi cations, features and usage of H2U series PLC, and there are PLC instructions set summaries for easy reference. For both the user program development environment usage and programming methods of this product, please refer to our company’s “Auto-Shop programming software user’s Guide “,” H2U series PLC programming reference manual ” and ” H2U series communication manual”. Features of H1U Series Programmable Controller: Building-in large program memory space without an external extension memory card, it can up to 8K steps. User program and all the power-down devices can be permanent backup in the power-off status, and the realtime clock can keep at least 20 days in power-down situations without batteries (power-on time is longer than 5 minutes). Provide high-speedmulti-channel and high frequency I/O ports as well as excellent operation and positioning control functions. Integrate two independent communication ports, providing excellent communication protocols and MODBUS instruction, which is convenient for system integration. Comprehensive encryption features can protect users’ intellectual property rights. With powerful networking and support CAN-BUS.