DCS system is one of the more important system tools in the production of our chemical enterprises, so how to correctly and effectively master the system maintenance methods, improve the system operation efficiency and ensure the good operation of the system? Now let's take the DCS card of Zhejiang University as an example to help more friends master the correct system maintenance methods from the aspect of basic maintenance.
1. Routine maintenance
(1) Central control room management
Seal all wiring holes (pits) that may introduce dust, moisture, rats or other harmful insects;
Ensure the stable operation of the air conditioning equipment, ensure that the change of room temperature is less than +5 ℃ /h, and avoid condensation on the system equipment due to the rapid change of temperature and humidity;
The site shall be reasonably isolated from the control room to prevent dust from entering the control room. At the same time, the control room shall be cleaned regularly to keep it clean.
(2) Operation station management
Operate in a civilized manner, take good care of the equipment, keep it clean, ash proof and waterproof;
It is strictly forbidden to refit or disassemble the machine without authorization
It is strictly prohibited to use non genuine software, and use foreign floppy disks or CDs with caution to prevent virus intrusion;
Unnecessary operation on the operation platform is strictly prohibited;
Make hard disk backup of various drive software and configuration software required by the system;
(3) Control station management
It is strictly forbidden to refit or disassemble system components without authorization; Do not pull the cage wiring, grounding wire, power supply line, communication cable, etc. for no reason;
Lock the cabinet door;
Check the control station regularly.
2. Preventive maintenance
At least once a year
卡件冗余测试 、通信冗余测试 、供电冗余
Card redundancy test, communication redundancy test, power supply redundancy
3. Maintenance during overhaul
(1) System power failure
System power failure steps:
After each operation station exits the real-time monitoring and operation system in turn, turn off the power supply of the industrial computer and display of the operation station;
Turn off the power supply of the control station power box one by one;
Turn off the power switch of each branch;
Turn off the uninterruptible power supply (UPS) power switch;
Turn off the main power switch.
The operation station and control station are powered off and purged for maintenance. Including the dust cleaning of the internal part of the industrial computer, the cage of the control station, the power box and other components.
System power supply line maintenance. Including distribution box, terminal strip, relay, safety barrier, etc. Ensure that all components work normally and the circuit is reliably connected.! Pay special attention to the fact that the ups battery will still generate high voltage after power failure. Please pay attention to safety.
Maintenance of grounding system. Including terminal inspection and ground resistance test.
Check the connection line and connection point of the communication line to ensure that all components work normally and the line is reliably connected. Mark the dual network cable
(2) Maintenance content
(3) Power on the system
(4) System test
(5) Loop operation
That's all for the basic maintenance of Zheda central control DCS card. Only proper maintenance during daily use can make the system better used. You can pay attention to our website http://www.sdjkyqyb.com Ask for more.