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- Commodity name: Information Management System Case for Casting Cranes - Metallurgy
Metallurgical enterprises use MH-SCADA to improve production efficiency - Casting crane management system
1. Case BackgroundThe transportation of high-temperature molten steel by casting cranes is a very important production link for well-known large steel metallurgical enterprises in China. To ensure the safe transportation of high-temperature molten steel and to guarantee uninterrupted production 24 hours a day, this steel plant introduced the MH-SCADA system to enhance the safe operation of casting cranes and reduce maintenance time and spare parts costs. 
2. Case Analysis
This steel plant has set up a total of 6 large-tonnage casting cranes in one workshop, of which 3 are used to add molten iron from the blast furnace into the steelmaking furnace, and the other three are used to inject the refined molten steel into the casting machine to produce usable steel. Each crane uses a set of MH-PLC 300S series PLCs to control the THYROMAT pressure regulating and speed control device and the MVCAN inverter to drive the operation of each motor, allowing the crane to move in space, lift and lower the ladle, and complete the pouring of molten steel. Each PLC group communicates with the inverter using the ProfiBus-DP protocol.
Each crane is equipped with a local monitoring terminal to monitor the operating status of the crane and to help maintenance personnel quickly troubleshoot any abnormal conditions, performing daily maintenance and inspections. In the central control room, there is a terminal that can view the status of all 6 cranes with a total of over 2000 I/O points, providing an overview of all crane operations.
The status of crane equipment changes rapidly. To ensure the safe operation of the cranes, the entire system must collect crane information at high speed to ensure that no critical moment is missed. The unique high-speed collection driver of MH-SCADA meets this requirement well. On all 6 cranes, MH-SCADA continuously collects real-time data from the PLC within a super short cycle of less than 100ms and converts this information into millisecond-level trend curves, allowing on-site maintenance personnel to accurately grasp crane operation information and precisely identify faults or potential issues.
To improve crane operating efficiency and reduce fault maintenance time, the system fully utilizes the alarm management function of MH-SCADA, statistically analyzing all alarms during operation to identify the most frequently occurring alarms, helping maintenance personnel to promptly eliminate faults and reduce downtime. This alone greatly improves the efficiency of the entire production process.
MH-SCADA categorizes and stores detailed operational data of the cranes in a database, making it easier for maintenance personnel to understand the actual operational lifespan of the cranes, such as which parts bear greater loads, which parts have been in operation longer, and which parts are more prone to aging or failure. Equipment management personnel can use this information to develop more reasonable and effective spare parts and component replacement plans, reducing spare parts inventory and improving spare parts utilization.
MH-SCADA utilizes the security mechanisms of the Windows system to establish a reasonable permission allocation. Users with different permissions can perform different operations, effectively ensuring the security of on-site data and records, as well as the validity of operational data. MH-SCADA sets high security permissions for PLC programming, which facilitates on-site engineers to analyze and test the system in conjunction with the PLC program, while also ensuring that the PLC operating program is not easily modified, ensuring the safe operation of the equipment.
3. User BenefitsThe MH-SCADA system successfully controls the fault operation and maintenance time of the cranes within a reasonable range, increases the average fault-free operating time of the cranes, reduces losses caused by unexpected equipment downtime that leads to decreased production efficiency, and also enhances the safety of cranes lifting high-temperature molten steel, ensuring the safety of on-site personnel. 
By utilizing the equipment information recording function designed by MH-SCADA, this steel plant has developed a more reasonable spare parts inventory and usage plan, also reducing their financial investment in this area, successfully saving a significant amount of equipment maintenance costs.