All control systems of our furnaces are based on Siemens programmable logic controller (further PLC) modern series S7 1200, S7 1500 using a remote input/output systems ET 200.
These programmable controllers give to control systems the high logic flexibility. It allows to solve a wide range of tasks. ET 200 remote I / O systems allow to significantly reduce cable-conductor products, which leads not only to reducing the cost of the system as a whole, but also increases reliability by reducing physical connections.
For the implementation of the human machine interface (HMI), Siemens operator panels of various modifications are widely used – basic, comfort or pro – or industrial computers (upper level of management) depending on the tasks which should be performed.
Fig. 1. Example of an operator panel
Software development is carried out in the TIAPortal environment
TIAPortal has a high degree of integration, allowing in one environment to perform field level programming (if possible), the level of PLC and HMI.
Fig. 2. Example of the main frame of the upper control level of the heat aggregate
Fig. 3. Example of the main frame of the upper level of the transport system control
For contact between the controller’s rack, remote racks, HMI units usually use Ethernet, Profinet, Profibus and other standards are used.
Ethernet and Profinet has the topology “bus”, “star” or “ring”, depending on the tasks and the degree of responsibility of the networks. Networks are implemented on the basis of managed and unmanaged switches such companies as Siemens, Phoenix Contact, Weidmuller, Schnaider and others.
Fig.4 Example of network topology
Power section, commissioning system, soft starters, frequency converters are designed on the products of Siemens, Schneider. For mounting it is used devices and materials of next firms:
For designing and implementing a large amount of equipment, it is possible to organize a separate server (in addition to the top management level) to collect data for registration of all object parameters, that are necessary for diagnostics, analysis of events and states.