2.2 controls requests
Take the pond bridge pumping station as the facility object, carries on transformation which the entire pumping station the automation monitors and manages.
(1) transforms the pumping station the water pump controlling switch cabinet, enable it to have and the long-distance control function.
(2) transforms the pumping station the power factor to compensate the cabinet, can realize automatic compensation with the long-distance electrical network monitoring.
(3) transforms the pumping station the transformer room regarding transformer A, B, the C three-phase temperature carries on the long-distance demonstration, the high temperature reports to the police and so on the function;
(4) establishes the pumping station the control room, implements three cascade control to the pumping station, establishes the automation in the control room to monitor the control desk and the signal processing cabinet.
(5) uses SIEMENS S7-300 series PLC, to the entire pumping station realization automation monitoring, the water pump will act according to the condition which will pump, the water level, the rainfall, the electrical network condition, operating mode and so on strobe position automatically throws cuts.
(6) through adds water the potential difference examination, prompts or automatically throws the excision dirt machine.
(7) uses the high performance 10 inches real colors LCD to touch the type display monitor, carries on the dynamic monitoring management to the entire pumping station, the breakdown reports to the police, operating mode record and report form printing.
(8) reserves the correspondence connection, may carries on the region monitoring and the data transfer through the telephone channel or the DDN net networking.

3. Hardware system constitution
Requests according to above, we developed have developed the following this set of pond bridge pumping station automation supervisory system. The system structure see Figure 2. The main disposition is as follows.
3.1 PLC disposition
Pumping station automation supervisory system PLC uses SIEMENS the S7-300 series. According to system request, PLC overall disposition as follows:
(1) central processing module (CPU): Selects CPU314, memory RAM expands 64K.
(2) digital quantity load module (DI): Selects SM321, altogether 8 (16/). Processes 128 input signals.
(3) digital quantity output module (DO): Selects the SM322,4 block is 16 /, 4 are 8/. Processes 96 output signals.
(4) simulation quantity load module (AI): Selects SM331, altogether 3 (8/). Processes 24 input signals.
(5) connection module: Selects CP340, altogether 2, 1 is the RS232 connection, 1 is the RS485 connection.
PLC has used four frames, has three in the RTU signal cabinet, for spare expansion frame; Another in the control desk, through the IM361 expansion connection, simplified the wiring like this, greatly enhances the reliability.
3.2 touches the screen disposition
Touched the screen to use Japanese DIGTAL Corporation's 570 HMI (SIEMENS not to have this kind of HMI to realize the above request at that time). HMI is by the RS232 connection and the PLC CP340 connection, uses SIEMENS 3964R the agreement to complete the correspondence.
3.3 electrical networks monitorings disposition
The electrical network monitoring uses French SOCOMEC Corporation DIRIS the M electric quantity monitor, may examine the three-phase 四线�?phase voltage, the line voltage, the interphase current, the zero curve electric current, has the merit reactive power, the power factor, the frequency and the corresponding maximum value. The monitor uses the MODBUS agreement and the PLC CP340 connection by the RS485 connection, transmits the electrical network monitoring data. Because the pumping station is uses the pair of road electrical network 进线, therefore has applied two sets of electric quantities monitors, separately installs on two sides 进线cabinets.
Other installments signals all are select the spot through the digital quantity or the simulation quantity to enter with the PLC connection.

4. software monitorings realization
Pond bridge pumping station automation supervisory system software mainly has two parts: PLC monitoring software and touches the screen chart to control software. PLC monitoring software is composed by several big modules.
4.1 systems examinations and breakdown processing module
The system examination processing all input signal, will make the different response according to the special details. The processing signal includes: Six pump the electrical machinery the temperature and the vibration; Passes in and out 水闸�?the condition; Saves the waterhouse fluid position; Protects from fire the security security; Two power transformers temperature; Rainfall; Four power factors compensate the cabinet operating mode; The electrical network operating mode (the voltage owes presses with has pressed the monitoring; Three-phase current overload monitoring; Lacks monitors; Three-phase not balanced monitors; Power overload monitoring; Power factor monitoring; Electric quantity accumulation); 污水�?water level and so on.
The system failure classification is three levels: Level of breakdowns define as are highest-level. When breaks down this kind of, will forbid all controls output. The acousto-optics reports to the police, the recording printing, demonstrates the breakdown type and the solution on the display monitor. Only has in fixes the breakdown, after artificially repositions the key system rehabilitation. Two levels of breakdowns define for are secondary. When breaks down this kind of will forbid the breakdown control output, the system to do automatically regulates the continuation current operation. The breakdown reports to the police and restores the identical level breakdown. Three levels of breakdowns definitions position is most preliminary. When breaks down this kind of, the acousto-optic early warning, does not only sever the current operation. Each kind of breakdown implementation related breakdown acousto-optics produces which according to the system in reports to the police with the record. This moment touches the type display monitor to enter the breakdown to report to the police the picture, the demonstration breakdown content, the nature, the place, the time and the solution, and printing.
4.2 eliminates the dirt machine and drainage pump movement processing
The pumping station has two to eliminate the dirt machine, the system to eliminates the dirt machine operating mode to carry on the monitoring. The breakdown signal sets at the position, sets at two levels of breakdowns to report to the police, by<系统故障处理>Module processing. Lightens or extinguishes the related indicating lamp according to the signal condition. Machine at the same time in touches on the type display monitor to demonstrate. When chooses except the dirt cabinet on selection switch far controls, the control desk in pumps before the automatic movement, first carries on dumps pollutants to operate. Uses the water head examination, then according to the water head symbolized the implementation automatically dumps pollutants. When automatically dumps pollutants, first in the scene acousto-optics early warning, then moves the installment.
Pumps starts the cabinet to have six AND-OPERATIONS to unite carries on the control.
(1) when the breakdown signal sets at the position, sets at two levels of breakdowns to report to the police, by<系统故障处理>Module processing.
(2) lightens or extinguishes the related indicating lamp according to the signal condition.
(3) when pumps on the switch cabinet the selection switch to choose far controls, may implement four kinds in the control desk to pump the movement way: Manual way; Automatic way; Pumps out the way in advance; Overhaul way.
(4) pumps the establishment in the control desk to each to have respective condition indicating lamp; Manual operation 按纽 and selection switch.
(5) Shan Taibeng selection switch has the fourth gear: Stops; Overhaul; Manual and is automatic. When establishes the manual files may implement manual or pumps out the operation in advance. When automatic files allows to be supposed to pump enters the system automatic movement configuration.
(6) establishes in the system operation has the third gear the selection switch: Stops; Automatic and pumps out in advance.<停止>Forbids movement which all pumps;<自动>Allows Shan Taibeng the selection switch to establish in the automatic files pumps enters the automatic movement configuration.<预抽�?Allows Shan Taibeng the selection switch to establish in the manual files pumps pumps out the movement in advance.
(7) pumps the start and stops wanting the time delay to invest and the withdrawal in turn.
(8) pumps basic interconnection condition: A. Level of breakdowns, the power failure prohibition all pump the movement; B. Pumps the motor failure, pumps the start cabinet breakdown prohibition correspondence to pump the movement; C. Pumps the different movement must coincide above pumps starts the cabinet, between the control desk correct establishment; D. Water level interconnection.
(9) when satisfies above different interconnection condition, pumps may enter manually, the overhaul, pumps out or the automatic movement in advance.
(10) when pumps the automatic movement, must according to the gauging station and the water level area determined must move pumps the number; The judgement can invest the automatic configuration to pump whether satisfies the above request, if does not satisfy, then the breakdown reports to the police; If may the configuration pump are many to must put the operation pumping, then rests on these to pump the running time tiredly to count slightly pumps the investment movement. Reduces along with the water level, gradually withdraws from current running time longest pumping.
4.3 data processing and man-machine contact surface processing
(1) data statistics: Pumps the start cabinet exchange contact device movement to count; Pumps the running time accumulation; Pumping station displacement accumulation; Rainfall amount accumulation; Accumulates with the electric quantity.
(2) data establishment: Water level value, water head value and flow rate establishment; Transformer temperature and gas value establishment; Rain size establishment; Pumps the electrical machinery the temperature and the vibration value establishment; Electric power parameter establishment; Security effective or not establishment.
(3) with touches the type display monitor the data communication: Touches the type display monitor to use the industry level man-machine to lie between the surface. Mainly completes the following task: Pumping station movement monitoring; The breakdown reports to the police, records and removes the prompt; Parameter establishment; Simulation keyboard operation; Data record processing; Craft curve demonstration; Operating mode conformable display; Pumping station general picture demonstration.
(4) printer printing processing: Breakdown stochastic printing; Running status printing; Parameter establishment printing; Statement of work printing; Dynamic curve printing; Equipment condition printing; Data statistics printing; Screen printing.

5. conclusions
The pond bridge pumping station automation supervisory system transforms until now already the nearly for two years from 1998, the normal operation proved that, The overall system design reasonable is advanced; Operates easily; The reliability is high; Completely conforms to the user anticipated requirement, will promote the application to other areas.