1) DCS systems often have rich self diagnostic functions. Based on the alarm, the fault point can be directly identified, and the maintenance results can also be verified by eliminating the alarm.
2) Poor contact of communication connectors can cause communication faults. After confirming poor contact of communication connectors, tools can be used to redo the connectors; If the communication line is damaged, it should be replaced in a timely manner.
3) The flashing fault light of a certain card or all data on the card being zero may be due to incorrect configuration information, the card being in a standby state with redundant terminal connection wires not connected, the card itself malfunctioning, or the lack of configuration information in that slot.
4) When a certain production status is abnormal or an alarm occurs, we can first find the instrument that reflects this status, and then use the instrument to check the correctness of the signal one by one along the direction of signal transmission until the fault is identified.
5) When a large-scale hardware failure occurs, the most likely cause is the system operation failure due to poor maintenance of the DCS system environment. In addition to emergency spare parts replacement and system cleaning work, it is also necessary to contact the manufacturer in a timely manner, and have the manufacturer’s professional technical support engineer further confirm and eliminate the fault.
For the maintenance work of DCS system, the key is to achieve prevention first. As system maintenance personnel, they should develop scientific, reasonable, and feasible maintenance strategies and methods based on system configuration and production equipment control, achieve close coordination between preventive maintenance and daily maintenance, carry out systematic, planned, and regular maintenance, ensure that the system operates well in the required environment for a long time, and ensure smooth and stable production process control and operation, To provide reliable guarantees for achieving production and efficiency goals.