Emerson 1C31169G02 Controller Emerson. Shanghai Sijian Intelligent Technology Co., Ltd. is engaged in technical development, technical consultation, and technology transfer in the fields of intelligent technology, information technology, and automation technology. The company also sells electrical equipment, automation equipment, electronic products, communication products, and electromechanical products. Industrial automation products include: PLC, DCS, sensors, frequency converters, encoders, relays, servo drives, soft starters, and touch screens. Product brands involved include: Eurotherm, Schneider, Siemens, ABB, SICK, P+F, E+H, Yokogawa, Yamakawa, Mitsubishi, Emerson, Honeywell, FANUC, GE, Eaton Electrical, CT.

1. The instruction register is used to store the instruction being executed. Instructions are divided into two parts: the opcode and the address code. The opcode indicates the operation type of the instruction, such as addition or subtraction; the address code provides the operand address of this instruction or relevant information to form the operand address (in which case the operand address is formed through the address formation circuit). There is a type of instruction called a branch instruction, which is used to change the normal execution sequence of instructions. The address code part of this instruction provides the address of the instruction to be executed next.

2. Opcode decoder: Used to decode the opcode of the instruction, generate corresponding control signals, and complete the function of analyzing the instruction.

3. Emerson 1C31169G02 Controller Emerson Timing circuit: Used to generate timing signals. In microcomputers, timing signals are generally divided into three levels: instruction cycle, bus cycle, and clock cycle. The micro-operation command generation circuit produces various micro-operation commands to complete the operations specified by the instruction. The generation of these commands is mainly based on timing signals and the operation type of the instruction. This circuit is actually the implementation of the expressions for each micro-operation control signal (such as the A→L expression above) and is the most complex part of the combinational logic controller.

4. Instruction counter: Used to form the address of the next instruction to be executed. Typically, instructions are executed sequentially, and instructions are stored sequentially in memory. Therefore, in most cases, the address of the next instruction to be executed can be formed by incrementing the current address by 1. The micro-operation command "1" is used for this purpose. If a branch instruction is executed, the address of the next instruction to be executed is the target address of the branch. This address is in the address code field of the branch instruction and is directly sent to the instruction counter.

The microprogram controller was proposed to address the shortcomings of combinational logic design, such as difficulty in design, inflexibility, and challenges in modification and expansion.