(1) Safety: Natural gas dosing equipment involves gas transportation and processing, and safety is the primary consideration. Ensure that the PLC system has the necessary safety protection functions, such as emergency stop button, overvoltage, overcurrent, leakage and other safety detection and protection mechanisms.

(2) Leakage detection and alarm: In natural gas dosing equipment, leakage may cause potential safety hazards. PLC should be able to monitor and detect gas leaks, and send out alarm signals in time to take corresponding emergency measures.

(3) Flow control: Natural gas dosing equipment usually requires precise flow control of gas. The PLC should have corresponding analog input and output (I/O) interfaces, which can read and control flow sensors, valves and other equipment to achieve accurate flow adjustment.

(4) Pressure control: In natural gas dosing equipment, the control of gas pressure is also an important part. The PLC should have an analog input and output (I/O) interface, capable of reading and controlling pressure sensors, pressure regulating valves and other equipment to achieve precise pressure control.

(5) Temperature control: In the process of dosing natural gas, temperature control is also the key. The PLC should have an analog input and output (I/O) interface, capable of reading and controlling temperature sensors, heaters and other equipment to achieve precise temperature control.

(6) Data recording and monitoring: PLC can be used to record and monitor the operating status and parameters of natural gas dosing equipment. Through HMI (human-machine interface) or other monitoring systems, real-time display of gas flow, pressure, temperature and other information, and record historical data for subsequent analysis and optimization.

(7) Fault diagnosis and maintenance: PLC should have a fault diagnosis function, capable of detecting and alarming equipment faults. In addition, regularly check the status of PLC hardware and software to ensure it is functioning properly and perform necessary maintenance and updates.

(8) Compliance: When designing and using PLC to control natural gas dosing equipment, it is necessary to comply with relevant safety standards and regulations to ensure that the equipment complies with local laws and regulations.