NA-RTU, as the core unit of single well monitoring and control in the oilfield, selects the appropriate acquisition/control/communication mode through configuration/configuration, and has the functions of timing and instant acquisition of wellhead sensors, oil well pump power diagrams, electrical power diagrams and pumping unit electrical, The functions of data such as electric energy have the functions of remote control of well start/stop, inverter parameter adjustment, oil well flush adjustment, etc., and have sensor over-limit alarm, contactor diagnosis, upstream and downstream network fault alarm, and uplink network interruption to collect data. Automatic caching function.
RTU oil well application structure
RTU data acquisition mode:
Through RTU I/O interface, wireless ZigBee network, RS485 wired fieldbus network three modes;
? RTU start and stop control mode:
Control the start and stop of the well through the DO interface of RTU;
RTU adjusts the frequency converter:
Through RTU RS485 interface (Modbus RTU protocol) to achieve;
? RTU to Frequency Converter (Oil Tuning Times):
Can realize through RTU DO interface or RTU RS485 interface (Modbus RTU agreement), the oil well up and down rushes the different speeds to run the oil well the realization through the RTU DO interface control frequency changer I/O disposition realization frequency changer frequency conversion - Variable speed operation;
RTU reads electrical/electrical data:
Read the well electrical/electrical data of multi-function meter through RTU's RS485 interface (Modbus RTU protocol);
RTU reads the power diagram data:
RTU supports the following types of dynamometer acquisition modes;
1. Cable load sensor + cable angle displacement sensor display power meter measurement mode;
2. Wireless load sensor + wired dead point switch power diagram acquisition mode;
3. Wireless load sensor + wired dead point switch + photoelectric encoder (supported with intelligent pumping unit) dynamometer acquisition mode;
4. Wireless load displacement integrated sensor mode
RTU data sampling mode:
1. Wellhead process parameters, electrical/electric energy parameters, and dynamometer data sampling cycles can be set separately;
2. The number of dynamometer packets can be set;
3. RTU supports remote real-time data reading;
4. To support the readout of the instantaneous power diagram of the fault (electrical power diagram) of the oil well;
RTU communication with monitoring center:
Use RTU's Ethernet interface to communicate with the monitoring center through the fiber/wireless bridge computer network;
Connects to the DTU through the RTU's RS232 interface and the monitoring center through the GPRS/3G public network platform;
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