Shagang Group is a key enterprise group in Jiangsu Province, a national super large-scale industrial enterprise, and the country's largest private steel company. Shagang Group currently has a total assets of 130 billion yuan and more than 35,000 employees. The annual production capacity is 27 million tons of iron, 31 million tons of steel, and 30 million tons of rolled steel. Ranked 35th among China's top 500 enterprises announced in 2009, ranked 11th among China's top 500 manufacturing companies, and ranked 1st among private enterprises nationwide. It has also become one of the top 500 companies in the world and is also the only company on the list. Private enterprise.
Shagang Group has dozens of reservoir areas such as hot coil slab warehouses, heavy warehouse project middle warehouses/finished product warehouses, heat treatment project finished warehouses, etc.; and each warehouse area uses more traffic (bridge cranes) to the reservoir area. The goods are carried inside. Therefore, the delivery room in the warehouse area needs to communicate with the traffic control room, as follows, to reach the control room for each traffic.
The early realization method was to establish a communication connection between the host of the delivery room and the host of the driving control room through the cable, but since the driving is a mobile device, the cable is greatly worn and thus has a high maintenance cost. At the same time, there is a great safety risk in line wear. Therefore, it was decided to use wireless communication to achieve the communication between the delivery room and the control room.
system requirement
Due to the mobility of the vehicle, wireless transmission must be used.The area of ​​the reservoir is large and electromagnetic interference is large. The wireless communication products can ensure reliable communication of at least 500 meters.
The product must have a fast roaming switching function to ensure that different APs can be switched in time during driving and ensure the reliability of data transmission.
Products must have reliable industrial grade requirements, such as wide temperature and other industrial certifications.
Moxa solution
This time Shagang's wireless communication system involves a total of steel billet storage, hot plate coil project finished product warehouse, heavy plate project raw material slab warehouse, heavy plate project intermediate warehouse, heavy plate project finished product warehouse, heat treatment project raw material steel plate warehouse, heat treatment project The seven warehouse areas, including the finished product warehouse, all require wireless monitoring of the traffic in the warehouse area.
The end customer used Moxa AWK-3121 to build a wireless communication system throughout the reservoir area. First, connect the industrial control computer in the driving area of ​​the warehouse to the Moxa AWK-3121. The AWK-3121 acts as a client to extend the antenna through the feeder to the driving control room. Then, an AWK-3121 is placed at the center of each floor in the warehouse area. The AWK-3121 is set to the AP mode, and each AWK-3121 centrally installed in the dock is connected to the delivery room by wire. In this way, the AWK-3121 in the driving control room can establish a connection with the central AWK-3121 through a wireless link, thereby realizing real-time communication between the delivery room and each driving control room.
The AWK-3121 is an industrial-grade wireless product that supports Moxa's unique Turbo RoamingTM fast roaming switching technology. It can achieve AP roaming switching within 50ms under specified conditions, ensuring the continuous reliability of communication data. In addition, the AWK-3121 supports long-distance communication of 10 KM, which reduces the number of AP Severs in the reservoir area and saves customers a lot of acquisition costs. The unique industrial grade design of the AWK-3121 also fully meets the needs of industrial sites. AWK-3121 has passed many industrial grade certifications, such as UL/cUL Class I Div. 2, ATEX Class I Zone 2, EN50155, EN50121-1/-4 and Directive 72/245/EEC, etc.; its wide temperature model can also be in - Steady operation in an environment of 40 to 75°C.
System configuration diagram
Why Moxa?
The AWK-3121 supports 10 KM long-distance communications, reducing the number of AP Sever installations in the reservoir area and saving costs.The AWK-3121 supports Turbo RoamingTM fast roaming switching. APW roaming switching can be performed within 50ms under specified conditions to ensure continuous communication between the traveling and delivery rooms.
AWK3121 series of industrial-grade quality, through a number of industrial-grade certification such as C1D2, EN50155, etc., support -40 to 75 °C operating temperature, to ensure stable and reliable work in the harsh environment of the steel factory warehouse.
The AWK-3121's fanless and low-power design strongly guarantees reliable and stable operation of the equipment. Its MTBF has reached more than 20 years.
Application product introduction
AWK-3121
Compatible with IEEE802.11a/b/g standards Supports redundant 24VDC power supply and PoESupport WPA/WPA2/802.1X/MAC address filtering and other security features Rail mounting or wall mounting
High-strength housing design with IP30 protection Supports fast roaming Turbo RoamingTM
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