【文章內(nèi)容簡介】 at the same time learn from their own, but also assume responsibility for preaching to other operational personnel. our pany39。s hot water network project is the use of puter monitoring system to achieve hot water production and operation of the prehensive monitoring of the data. its main ponents include the controller, input and output modules and monitoring stations. our pany has 18 sets of scan3000 / s9000 distributed control system (dcs), which has the functions of hot water network operation loop control, data acquisition, data munication, centralized information management and operation display functions. it is equipped with two s9000 controllers, and another 12 singleloop controller (honewell udc3300), as the control loop redundancy controller and emergency hand terminal. udc as a backup handheld device can dcs in the event of failure, the control loop to control. with easy to operate, programmable, high stability characteristics.dcs system and udc can achieve between the nondisturbance switch, to ensure the stability of the system operation. s9000 controller through the dvc munication port of the dmc munication circuit and singleloop controller to achieve munication。 through the mgtsta munication port and the system monitoring station munication card connected. with these control systems, usually a variety of parameters of the regulation and personnel labor will have a multiplier effect. these control systems are made up of measuring elements (temperature transmitters, pressure transmitters, differential pressure transmitters), control elements (s9000, udc), actuators (regulators, etc.). control flow is such that the scene collects data from a meter, the transmitter sends 420ma signal to the s9000 (that is often said dcs), 15v signal to the udc. and then issued by the s9000 or udc 420ma signal (udc series with 250ω resistor, 15v signal to 420ma signal) to adjust the actuator. in this process, the instrument39。s power supply from the two siemens 24v dc power supply (the two power supply each other spare), the power to the distributor, and then by the electrical distribution to a primary meter power supply (the middle of electrical distribution in order to meter repair , will not have a short circuit, and damage the dc power supply). dcs or udc receives the signal that is displayed on the crt or udc own screen. dcs or udc control signal to the impedance converter, distributor, the isolation module or isolated relay relay to the executive control.isolation module is through the analog signal, that is, continuous control signal 420ma, such as the valve opening, level control。 and isolation relay is the switch signal to the dcs, such as temperature switches, pressure switches and pumps start, stop state, etc. (plus isolation module, isolation relay is to isolate strong signals, so as not to s9000 in the loop control card burned).during the shift, as a monitor, i assume the responsibility of the entire hot water network security and economic operation, the spirit of a high degree of concentration during work, leading the team members carefully adjust the parameters, careful analysis of the data, sum up the law, found that equipment defects and risks, to prevent the expansion of the accident. not only to ensure the safe operation of the hot water network, but also to the economic operation. in some parameters and equipment anomalies, can do a timely analysis, find out the reasons and report, with a certain degree of independent analysis. usually go to work, often carefully study a variety of professional knowledge and operating procedures, and can often do a good job in the minds of various accidents expected. in the first station when various types of accidents, can be accurate and decisive for processing and scheduling, and quickly restore the normal operation of the system. during the operation of the office of the ministry of operations, i not o