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Application of ICP DAS I-7000 Module in Deep Well Pump Group Control
Abstract: Aiming at the low control level of deep well pump group control system in brewery, it is difficult to meet the requirements of water supply in breweries and developed a control system of deep well pump group with high reliability and low cost.The water supply is the lifeblood of beer production, Demand is large and changes over time, taking into account the cost and reliable water supply, Yanjing Brewery water supply is not by the water company, but by distribution within a few kilometers radius of 100 meters 25 deep well pump group to supply, In the past, there was no automatic control system. In order to adapt to the great changes of water consumption in beer production, a 24-hour on duty staff was required to open or close the pumping pump at the scene at any time and could not be interrupted for 365 days a year. The staff on duty had a lot of work intensity and worked Abnormal conditions, poor efficiency, can not meet the requirements of production water, therefore, the factory decided to use the automatic control system, the early use of a factory inspection device, because the quality of the system equipment and communication lines unreasonable design, the system Continuous failure, can not be put into use, for which, breweries using I-7000 series made a technical test, Experimental results demonstrate I-7000 Series can be full effect of its surveillance. I. Introduction: The I-7000 series is a function module applied in the field, which can realize the collection and control of the signal in the field. The I-7000 series is based on the RS-485 bus. The main control computer passes the RS- 485 bus to obtain data from the module or issue commands to the module, so the RS-485 bus is very important for the I-7000 module, and the existing line situation is extremely unsatisfactory, the scene distribution distance, irregular wiring, therefore, I-7510 repeater module is added for every more than 1200 meters, I-7510 is also added to the irregular line segment, and each transmission waveform is observed through the oscilloscope, and the transmission characteristics are changed by adding terminal resistance to achieve the best performance The system block diagram is as follows: The host computer through the I-7520 to achieve RS232 / 485 conversion, connected to each well by line, each well has a 35-55 kW three-phase motor, driven by the three-phase motor deep well pumping Pump, control three-phase motor on and off, using 4-channel relay output module I-7060D, the use of voltage / current sensor output 4 ~ 20 mA signal to the I-7017 Set three-phase voltage and three-phase current, reflecting the normal operation of the three-phase motor Second, the system functions and software implementation: According to the requirements of beer production, requiring 25 deep well pump operation can be set to manual and automatic two kinds of work Way, the manual operation mode, the operator can open or close any one well in automatic mode, according to the collected water level to decide how many wells to open or close, and according to changes in the water level per unit time to control The speed at which the pump is switched on or off, the water drawn by each pump is collected in the main water pipe and then flowed to the tank in the factory. Due to the limited pressure on the pipe and the huge pressure on the main pipe when the pump is started, Pumping time to open the strict control, can not be open at the same time, must be opened one by one, and maintain a certain delay, in order to protect the motor reliable and safe work, when the pump is turned on, but also to monitor the motor three-phase operating voltage and current , When there is imbalance and defects, you should turn off the motor and generate an alarm, which will help timely maintenance, so as not to Damage to motor Figure 1: Figure II: Figure control system uses the FIX software, FIX Intellution the United States launched the real-time monitoring and control of industrial and configuration software platform. In FIX and Visual C's powerful functions, the system software mainly to achieve the following functions: 1, the overall picture: Overview Map real-time automatic tour or manual display of all wells data, two pool water level, is the main interface for field operations, as shown Two shows. 2, automatic / manual switch: The system provides two modes of operation: the first for the whole manual mode, that is, the system only from the surveillance role, the switch pump by the operator to complete; second automatic mode, that is, the program set the water level After the system automatically track the water level, without human intervention. Automatic / manual switch to complete the main manual and automatic switching. 3, the report print: The use of Visual Basic database to achieve real-time data and historical data sharing, timed automatically print the daily report, and ready to print real-time reports. 4, Alarm: The system can define alarm events in advance, such as water level overrun, three-phase voltage / three-phase current overrun. When an alarm event occurs, the system will display this alarm, meanwhile, this alarm event forms a notepad file; Event is automatically deleted after confirmation. After the actual operation of the test, the system has fully achieved its intended purpose. Which ensures the reliable water supply requirements of beer production, improves the automation level, reduces the labor intensity of duty personnel and achieves good social benefits and economic benefits.