1.3.1 sewage pumping stations project characteristic
1) sewage pumping station SCADA the system RTU geographical position distributed scope is dispersible, inconveniences to the common control.
2) along with the city scale unceasing development, the overall system unceasingly expands, the request system has the easy extension.
3) should stand the SCADA system to have timeliness, to the signal should guarantee the prompt transmission, the long-distance station which defends to nobody value realizes the on-line remote control.

L. 3.2 SCADA system overall request
1) this system should guarantee as far as possible the equipment 先进�? adapts the computer control technology rapid development.
2) monitors configuration software to have the friendly user graphical interface, in order to user's operation.
3) this system should have the redundant reliability, satisfies the system the real-time surveillance and the on-line remote control function.

Second, sewage treatment SCADA system function synopsis

The sewage treatment SCADA system mainly and 遥测�?is composed by the manifold center. The manifold center real-time receive 遥测�?sends in the hydrology data, the logarithm according to carries on processing and so on inspection, storage, demonstration, printing, to all 遥测�?transmissions control command, transmits the number of times, the timing every day including the control and so on, according to the hypothesis time interval gap, calculates each 遥测�?time interval sewage treatment situation data, the statistics reports the data the number of times and the active status, retrieves the data.
遥测�?uses the RTU-2600 intelligence long-distance observation and control terminal is the core, the primary mission is automatic real-time gathering, the storage, transmits the scene sewage treatment equipment the working condition data and to the corresponding operating mode realization to the equipment automatic control, achieves 遥测�?nobody duty work.

Third, system composition and function

1 遥测�?composition

遥测�?by the sensor (rain gauge, 水位计and so on), the RTU-2600 intelligence observes and controls the terminal, the power source, the number passes on the broadcasting station transmitting end module, the water pump, the electrical machinery and so on is composed.
Sewage 遥测�?simple technical process
The sewage through collects the pipe network to flow in each sewage pumping station after the gate 集水�? the sewage pumping station after the simple treatment, through the leather belt, the grill, has filtered out the pellet big suspension; 集水�?achieved when certain fluid position, loses through the slush pump delivers the nearby dirty water works.
2 遥测�?functions

Below 遥测�?realizes the function take the RTU-2600 intelligence wireless long-distance observation and control terminal as the core:
�?the real-time gathering scene sewage treatment equipment operational data and saves the process to dodges saves (may retain 1 year historical data)
�?fixed time from the newspaper, (manifold center may control remotely establishment time interval gap according to the time interval to the manifold center transmission data, also may request on to pass on data on own initiative.)
�?event from newspaper outside, when the sewage treatment process has the condition, the system can automatically transmit the data to the manifold center
�?the passable artificial value number equipment scene has revised, the inquiry data,
�?the passable computer has read takes the historical data or the establishment system parameter
�?realizes the equipment automatic control (linkage and chain-like control)
�?receives the central station the control command and completes the correlation operation, like data clear zero and so on
3. scenes equipment connection and the data communication like chart shows:

Fourth, RTU-2600 long-distance observation and control terminal introduction
The RTU-2600 long-distance observation and control terminal is one kind entire is automatic, multi-purpose, the micro power loss observation and control terminal, its collection data acquisition, communication, control to a body, specially suitable domain and so on state of the water, environmental protection data automatic gathering.
RTU-2600 series programmable long-distance observation and control terminal integration formidable, nimble communication function, may through the satellite, wireless 基站, way realization long range data transmission and so on telephone line, GSM/GPRS/CDMA1x; Provides the rich I/O resources, you may truly feel gathering, the control, the communication all in one service. The pure metal outer covering, the high reliable industrial design, provides the width scope for you the power supply, the ultralow temperature, the high humidity industry movement guarantees.

RTU-2600 specification
Model RTU-2600
Flash 512K
SRAM 128K (256K may elect)
Ethernet connection 10Base-T
The wireless communication passes on communication module /GPRS/CDMA without the line number
The digital quantity inputs 16: Photoelectricity isolation, 24 V DC
The digital quantity outputs 8: The photoelectricity isolates,24 V DC/500 mA
The counter inputs 2: The photoelectricity isolation, 24 V DC, turns round with the digital quantity inputs
PWM outputs 2: 24 V DC/100 mA, turns round with the digital quantity outputs
The simulation quantity inputs 8: The 12-bit precision, 0~10VDC, 0~5VDC, -10~10VDC, 4~20mA may elect, 4.1kHz sampling rate
The simulation quantity outputs 2: The 12-bit precision, 0~10 V DC, 0~5VDC, 4~20mA may elect, 12 kHz speed
String mouth 1 RS-485, 3 RS-232 (may dispose is the TTL level), the baud rate is highest 115,200
The real-time clock has
看门�?has
Power source 9-36 V DC, 1.5 W~3 W, ties hands behind the back the protection
Operating temperature -40°C ~ +70°C
端子 may insert pulls out 端子, 3.50mm, 16-24AWG, 300 V,8A
Board size 114x80x20mm

Fifth, system design

5.1 network architectures

This system completes the discharge pipe 理处 control center and many sewage 遥测�?(pumping station) the communication, its network architecture is typical to the multi- spots structure, and the quantity many, the geographical position is dispersible; Passes on the broadcasting station way through the number to realize to the multi- spots communication, through telephone digit dialing communication way realization redundant communication network.
Is refers to the multi- spots communication way by 1 computer as the master station, many communications terminal took from the station, realizes the master station with from the station the communication one way, takes the discharge pipe 理处 control center the master station, each sewage 遥测�?(pumping station) takes from the station.

5.2 data transmissions way

Commonly used data transmission way: The private network (copper cable, optical fiber private or rent special line), radio network (directional radio, non- directional radio, wide frequency broadcasting station), simulation telephone network, satellite and so on.
By the scene demand condition considered plans to use the blower the communication way, in this communication way characteristic as follows:
1) the transmission speed is quick
2) the data receives the disturbance is small
3) the network is stable
4) the cost is low
5) the system skeleton cycle is short
6) the data transmission reliability is high

Simultaneously the system uses the disposable investment to be small, also the operating cost somewhat low, the reliable simulation telephone network way realizes each sewage pumping station to the discharge pipe 理处 debugging center redundant data transmission, guarantees the system whole the data transmission stability.

5.3 hardware dispositions

5.3.1 various sewage 遥测�?RTU station disposition

Each sewage pumping station already must carry on locally controls at the same time also must have the data transfer the function. Each sewage pumping station controller uses the prestige to control technical the RTU-2600 intelligence wireless long-distance observation and control terminal. It is the data acquisition, the communication, the control collection is a body high integration industry control product, internal integrated blower communication module, simultaneously the passable above RS-232 string mouth and the public telephone network are connected. RTU-2600 has the system memory, may provide 512K to fall the electricity storage space, uses in when the connection severance or the correspondence escapes the net preserves the important data, when completes the next connection may carry on the transmission.
The sewage pumping station each kind of examination measuring appliance, the control device condition signal meets the person to the RTU-2600 I/O module. Various sewage pumping station simultaneously provides the industry to touch the screen, may do for in the sewage treatment process in or the overhaul process man-machine connection.

5.3.2 control centers master station disposition

In the control center duty officers observation room, the disposition uses RAID the technology the IBM server, the RAID technology to saves the data carries on redundancy processing on the hard disk, may avoid the data missing which the hard disk breakdown brings Blower's omni directional antenna with installs on the server MPI (multi- spots connection) the communication card connected, simultaneously is connected through string mouth RS-232 and the public switched telephone network, receives the data which 遥测�?sends in.
Configuration software uses configuration king 6.0 on positions units condition software, the realization long-distance surveillance and the control, the data archive, the report form function, reports to the police the function and the printing function.

5.4 on positions machine software

Configuration software uses the Beijing Asia to control the company configuration king 6.0 on positions units condition software, it is based on many kinds of operations platform configuration software. Data gathers which from in long-distance station RTU-2600, the real-time reflection each sewage pumping station running status, on the position machine contact surface main demonstration partially including the sewage pumping station control flow, the running status, reports to the police with the historical data inquiry, the statistical report form, the tendency chart and so on. Belt control point flow chart reflection overall system each sewage pumping station running status, and by the tendency graph, the data and the scene maintenance is consistent, the running status table has reflected the equipment switch condition, the scene measuring appliance data (current capacity, water level).
The next chart is the configuration king software contact surface demonstration:

5.5th, system function

Below the entire supervisory system has the function.
1) telemeters the remote control. Long-distance gathering each station equipment condition and measuring appliance data, in discharge pipe 理处 control center position machine centralism demonstration; The long-distance control various sewage pumping station control procedure start, the equipment movement, stops; The control may the artificial intervention, also may automatically carry on according to the procedure hypothesis.
2) arise suddenly reports to the police. Various sewage pumping station has the independent control ability, but the automatic checkout equipment breakdown signal, and may report reports to the police the information.
3) long-distance hypothesis. The system long-distance hypothesis various sewage pumping station operational parameter, like reports to the police the limit, the interconnection value, the equipment running time and so on, may change various sewage pumping station as necessary the running status, carries on the remote control intervention.
4) data processing. The system puts on file the data which various sewage pumping station the equipment active status information and the measuring appliance gathers, and carries on statistical processing to the information and the data to file away, by report form form output.
5) network connection. The system uses the standard the network correspondence agreement, but conveniently integrates in other computer information management systems.

Sixth, concluding remark

This project in view of the sewage pumping station characteristic, the use long-distance correspondence constituted the SCADA control system, the realization sewage pumping station nobody value defends, enhanced the sewage pumping station use effect, reduced the operating cost advanced, the design, the movement has been reliable, suits to the modern sewage pumping station development tendency, successfully has applied to the city sewage pumping station, has obtained the good society and the economic efficiency.
Because uses the computer technology, the automatic control technology and the wireless communication technology, various sewage pumping station movement related parameter monitoring, the management level were allowed to obtain obviously enhances, improved the past manual recording malpractice, caused the sewage pumping station movement, the control and the management more real, is accurate.

The Beijing prestige controls the science and technology (www.vcontrol.com.cn) to offer the our company correlation product information and the solution in this, the choice for reference, if has other demands or seeks the help, please land the our company website or to Monday to Friday 9: 00 - 18: 00 dials the company telephone (010-82355900-862, 010-82356272-865) to consult.