The DCS control system of the chemical device is composed of system software, hardware, field instrument, and the like, and any link occurs, which will cause system partial functionality or trigger control system failure, which will cause parking of the production device when severe. Therefore, to see all the devices of the constituent control system as a whole, comprehensive maintenance management.
The daily maintenance of the DCS control system mainly includes: control room management, operator station hardware management, operator station software management, operator station check, control station management, control station check, communication network management.
Control room management
1. Sealed all walking holes (pits) that may introduce dust, moisture and murmour or other harmful insects, etc. (Such as the control room use overhead lines, the cable wearing a sealing module, etc.)
2. Ensure that the air-conditioning equipment is stable, ensuring that the room temperature change is less than 5 ° C / h to avoid condensation on system equipment due to temperature and humidity, and [according to HG / T20508 "control chamber should perform temperature and humidity control. Control Room operation room, cabinet room, engineer room, etc. EtOAc, 20 ° C ± 2 ° C in winter, 26 ° C ± 2 ° C in summer, temperature change rate is less than 5 ° C / h; relative humidity is: 40% ~ 60%, humidity The rate of change is less than 6% / h. "] 3. Avoid using radio or mobile communication devices in the control room to avoid interference with electromagnetic fields and radio frequencies. 4. Control the indoor H2S less than 10 ppb, SO2 is less than 50 ppb, and CL2 is less than 1 ppb. [According to the dust concentration of less than 10 μm in the air in the air in the air in the air should be less than 0.2 mg / m3; the maximum allowable concentration of the harmful substance in the air should meet the following provisions: H2S is less than 0.01 mg / m3; SO2 is less than 0.1 mg / m3; CL2 is less than 0.01mg / m3] 5. Admission personnel permission, key management.
Operator station hardware management
1. Keep clean, anti-grap resistance; 2. It is strictly forbidden to modify and disassemble the machine; 3. Keyboard and mouse operation should be properly used, easy to remove, avoid sharp objects; 4. Try to avoid electromagnetic fields to display Avoid moving industrial controls, monitors, etc., avoid pulling or taking the device to connect cables and communication cables. 5. The monitor should be kept away from the heat source to ensure that the display vent is not blocked by him; 6. Make sure the computer power switch is in the "Off" state before performing a display connection or removal; 7. Clean the display during regular wet sponge; 8.. Connection, demolish or move the operator station host in the case; 9. Operator station host power ground line should be connected to the system's workplace, reduce interference; 10. Operator's station host filter should be cleaned frequently.
Operator station software management
1. It is strictly forbidden to use non-genuine Windows software; 2. The operator is strictly forbidden to withstand real-time monitoring; 3. The operator is strictly prohibited to modify the configuration settings of the computer system, which is strictly forbidden to increase, delete or move the files and directories on the hard disk; 4. System maintenance It should be cautious to use foreign floppy disks or disc caution, prevent virus invasion; 5. It is strictly forbidden to make unnecessary multi-tasking operations in real-time monitoring operations; 6. System maintenance personnel should do a good job of control subdirectory files, each controlled PID parameters , The regulator is in response to system data record operation; 7. After system maintenance personnel make necessary modifications to system parameters, the system maintenance personnel should make a job in time.
Operator station check
1. Host, monitor, mouse, keyboard and other hardware is intact; 2. Real-time monitoring work is normal, including data refresh, functional screen (mouse and keyboard) operation is normal; 3. View troubleshooting screen, have trouble remarks .
Control station management
1. It is strictly forbidden to change the system components; 2. Do not pull the machine cage wiring; 3. Do not pull the ground line; 4. Avoid pulling or hurt the power supply line; 5. Lock the cabinet door. 6. Regularly clean the control station fan filter.
Control station check
1. Whether the card pieces are working properly, there is no fault display (view the indicator); 2. Whether the DC power module is working properly. 3. Is the grounding wire connection firm.
Communication network management
1. Do not pull or hurt the communication cable; 2. After the system is powered on, the communication line joint cannot touch the conductors such as cabinets, mutual redundant communication lines, communication joints can't touch, so as not to burn bad communication network card
There are a lot of friends to send a message to the lazy work control WeChat public account. I would like to pay attention to everyone. Thank you for your attention, individual questions have not responded in time, deeply regret, I suggest you join lazy work control QQ group: 641143682, this group You will solve your problem in time. , Read full text, original title: DCS control system daily maintenance
Article Source: [Micro Signal: HGYBWH, WeChat public number: lazy work control] Welcome to add attention! Please indicate the source of the article.
Our other product:
