Sichuan Hanyuan Manganese Industry Co., Ltd. built two 16,000KVA electric furnace manganese ferroalloy production lines. The control centers of the two production lines are divided into two parts, some of which are located in the raw material section (mainly complete two raw material crushing, raw material transportation, raw material ingredients), part of Located in the central control room of the electric furnace (mainly complete control of two electric furnaces); but the systems are independent.
The production line is equipped with 1# wire raw material on-site control station, 2# wire raw material on-site control station, 1# wire furnace on-site control station, 2# wire furnace on-site control station and packaging site control station (reserved) for a total of 5 on-site control stations. There are two operator stations in the dosing control room (for two separate lines), two redundant servers (two lines for common use) and two operator stations (for two electric furnace lines) in the electric furnace control room. , The workshop office set up an engineer station.
In addition to the common digital quantity, analog quantity, etc., there are some PROFIBUS-DP encoder signals and MODBUS smart meters in the field of measurement and control signals. Therefore, it is necessary to fully consider the communication problems with these signals during system selection.
Central control layer
The data server in the central control room can be connected to the system bus layer through ring industrial Ethernet. The data server in the central control room is connected to the system bus layer through the ring industrial Ethernet. The on-site operator and engineer station connect to the server through the standard Ethernet. .
System bus layer
The system bus layer adopts ring-shaped industrial Ethernet. The communication speed is 100M. The system has a high expansion capability. The system sites access industrial Ethernet through the MOX industrial switch. At the same time, the MOX industrial switch adopts redundant power supply.
All the controller hardware adopts S7-300 series products from German SIEMENS company. Each field control station consists of the following parts:
DIN mounting rack
PS307 power module
S7-300CPU.
SM signal input and output module.
Fieldbus layer
Field encoder apparatus through the access port excellent PROFIBUS communication system S7-300CPU comes.
The on-site smart meter can be connected to the system through the excellent PROFIBUS communication port of the S7-300 CPU through the MODBUS to PROFIBUS DP bus bridge.
