Using the Siemens S7 - - 200 PLC to realize the remote switch control system design

A, the

with the progress of The Times, the development of the society, constantly improve the industrial automation level, Profibus field bus technology is mature and perfect, the reliability and safety, which is applied to various fields. This paper describes PROFIBUS field bus in the fujian zijin mining transport workshop mine locomotive driving control and remote switch application example.

2, system description

transport workshop crane control and remote switch system adopt the way of 'centralized monitoring, distributed control', by the central monitoring station and four sub-stations ( Traffic control station, switch machine, switch machine D2 and D3 D1 stop, switch machine D4 station) Local area network (LAN) of industry. The Siemens S7 - each station 200 PLC controller to switch, traffic monitoring and control management, working condition of PLC through the communication module and PROFIBUS fieldbus, by computer control monitor system operation and display.

3, system composition,

4, system function

1, remote control

transport workshop USES the underground locomotive transportation mode, the locomotive track 5. 5 km, track is divided into the inner ring and outer ring; D1 switch is controlled from the 987 meters, D2 and D3 switch is controlled from the 1645 meters, D4 switch is controlled from the 2754 meters; Switch from outer to inner ring or from inner to outer by computer remote control operation. Adit mouth orbit 100 meters to 600 meters equipped with three parking areas, parking areas of traffic light can automatically transform according to the parking area, also can through the central control computer directly operate the parking area of the traffic light conversion.

2, remote monitoring,

using remote control method, PC can monitor the whole process of remote operations; When local control mode is adopted, in situ can control switch and a corresponding instructions, PC can monitor the whole process at the same time; Parking area of the traffic light automatic conversion, PC can monitor the whole process of its transformation.

3, permissions management

because this system operation involves the production safety, equipment safety and personal safety, so the operator and administrator operation respectively have their permissions. Control mode switching and remote operation switch must be authorized to operate in the future.

4, automatic interlock and unlock

when locomotive running to the front of the switch 40 meters, automatic interlocking, then remote control can't control switch. When the locomotive driving to 80 meters after the switch, automatic unlock, remote control can control switch.

5, automatic alarm

the locomotive in the process of driving through a red light, then on the alarm sound and light alarm, prompt crane driver stop immediately, at the same time receiving alarm sound and light alarm, computer will automatically suggest that area through a red light, scheduling staff can call via the voice system driving the driver to stop immediately. Remote operation of the switch, switch machine has fault, computer will send out alarm, and prompt belongs to the type of fault, provide convenience for maintenance personnel.

5, the network characteristics and advanced

2, as a DP slave station, EM - 277 modules from the station to a variety of different I/O configuration, send and receive different amounts of data to master station. This feature, users can modify the amount of data transmission, so as to meet the needs of practical application.

3, unlike many DP station, EM - 277 module is not only the I/O data. S7 - and, speaking, reading and writing 200 CPU variables defined in the data block. In this way, users can exchange any with the main types of data. Moving data to S7 - in the first place 200 CPU variables in memory, then the input, counter, timer, or other calculation values transmitted to the host. Similarly, from the main data is stored in S7 - 200 CPU variables in memory, and can be moved to other data area.

4, EM277 PROFIBUS - DP of DP port modules can be connected to the network on a DP site, but still can be used as a MPI from station and on the same network as the SIMATIC programmer or S7 - 300 / S7 - 400 CPU and other host to communicate.

6, system software and hardware composition of main

1, the hardware

2, software of

1 set of WIN2000 operating system software

WINCC5. 1 1 set of configuration software ( Siemens)

S7 - 1 set of 200 programming software ( Siemens) Seven, conclusion

the whole system reliability and the high degree of automation, since the system put into use to reduce operator's work tasks, driving jump greatly reduce track events, obviously improve the production efficiency, and reduce maintenance costs. Fujian zijin mining locomotive transport workshop crane control and remote system application is successful, for mine locomotive automatic control to open a new path.

editor: gt

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