The MD-609G has a wide and mature application in many wireless monitoring and control systems. Here is a brief introduction to a pipeline wireless monitoring and control system built with the MD-609G. The pipeline wireless monitoring and control system is a professional wireless monitoring system for pipelines based on the GPRS communication network. It can realize large-scale (hundreds to thousands of monitoring substations) remote pipeline wireless monitoring. Through multi-threaded fully concurrent communication, using high-performance servers and high-performance remote monitoring and control terminals, it can meet the needs of long-distance pipeline telemetry, remote signaling, remote control, remote pulse, and remote adjustment for large and medium-sized cities and large oil and gas transportation companies. It can acquire various data from hundreds or thousands of substations within seconds and complete remote control and remote adjustment functions. It has a real-time response speed and near-zero failure and zero maintenance high reliability that many systems cannot match. I. System Functions This pipeline wireless monitoring and control system consists of two main parts: the field monitoring and control unit and the monitoring center. The field measurement and control unit includes wireless communication, field measurement and control, and corresponding power supply, surge protection, and other facilities. Its functions include: acquisition of various DC signals, acquisition of various switch statuses, control of various switch quantities, and accumulation of various pulse quantities. Wireless GPRS/CDMA communication is IP65 protected and can operate stably from -20°C to 70°C. It adopts a standard bus and protocol, providing scalability. In addition to a remote communication interface, it also has a local debugging interface for convenient on-site fault diagnosis. It has complete supporting testing tools to facilitate system debugging by engineers. The field waterproof measurement and control box meets IEC standards for EMC. The three monitoring centers enable the acquisition and processing of status data from all monitoring points in the entire pipeline network system. Through the powerful integrated softlogic function, advanced algorithms can be applied to all data, sending the results back to the field or to third-party systems or databases via embedded SQL, OPC, ODBC, and other standard interfaces to achieve full data sharing, cross-access, and a high degree of application independence. The monitoring center implements the following system functions: Supports multi-threaded, fully concurrent communication; data acquisition and algorithm processing; embedded Softlogic functionality compliant with all five programming languages ​​(ST, SFC, FBD, IL, LD) of the IEC61131-3 international standard, supporting users to write complex logic algorithms; detailed screen monitoring and realistic animation display; real-time data query, real-time alarm, and trend chart display; communication self-diagnosis function; automatic equipment alarm recording function; report generation and printing function; supports OPC and DDE client functions; supports DDE server functions; supports SQL/ODBC drivers. The monitoring center also implements the following extended functions: Industrial real-time database SIAD/SQL, achieving millisecond-level data storage; automatic hot standby redundancy at all levels including servers, monitors, and remote clients; automatic report generation and printing under real-time conditions; supports WEB publishing; high-speed storage and retrieval of massive amounts of data; supports remote client monitoring (Netlink Light); provides an OPC server supporting thin client remote access. II. System Architecture 1. Connection Environment System operating environment: Windows 2000 (or later), Tracemode 6.0 Communication protocol: Modbus Protocol Lower-level Machine Introduction: EasyControl Microgrid STC-1, here only one analog output is connected as an example to illustrate the transmission device: MD-609G (232 serial port) 2. Preparation: An RTU/PLC supporting the Modbus protocol, here we take EasyControl Microgrid's RTU STC-1 as an example to build the field power supply equipment, surge protection equipment, isolation coil, waterproof box, one MD-609G, and one upper-level configuration software, here we take Tracemode as an example to illustrate 3. System Architecture Connection. Connect the isolation coil, power supply equipment, RTU, and DTU as shown in the figure below: Explanation: (1) Since the STC-1 is powered by 24V DC, connect a 220V to 24V transformer to provide power to the RTU and DTU. (2) The RTU and DTU are connected via a serial cable. The RTU has 8 AI, 8 DI, and 8 DO channels, which are connected to the user's sensing devices to receive 0-5V or 4-20mA voltage or current inputs. (3) In this connection, only the AI1 analog input is connected to the 0-5V voltage input. The connection for other inputs can be deduced similarly. (4) In this connection, a regulated power supply is used to input 0-5V voltage from the AI1 to simulate the user's sensor voltage input, as shown in the figure below: Configure MD-609G. To connect the MD-609G to a remote monitoring center, internal configuration of the MD-609G is required (including baud rate, parity, etc., to ensure consistency with the serial port parameters used by the STC-1). Simultaneously, the mServer needs to be configured accordingly. See MD-609G Configuration for details. Virtual Serial Port Mapping: Because the MD-609G connects to the host configuration software Tracemode via a virtual serial port, virtual serial port mapping must first be performed on the MD-609G on the mServer. See mServer Virtual Serial Port Mapping for details. Creating a Project in Tracemode: See Method for Connecting MD-609G to Tracemode Configuration Software for details. Running: After the project is created, power on the lower-level device and run the host configuration project. The running interface is shown below: [b]Typical Applications[/b] Editor: He Shiping