LPP100A HITACHI controller module

LPP100A HITACHI controller module

Automatic parking protection

From the perspective of safety, the drawstring switch is installed on both sides of the conveyor belt. The blocking alarm switch is installed at the entrance and exit of the bucket elevator. In designing the program, the following protection was programmed.

If someone accidentally falls on the belt or violates the regulations by crossing (span, drill) the belt is running and meets the rope switch, the system will stop immediately, and send out sound and light alarm, prompting the operator to check and deal with. After the fault is rectified, press the reset button to clear the fault before restarting the system.

Once the entrance or exit of the bucket elevator is blocked, the blocking switch action, the system will stop immediately, and issue an audible and visual alarm, prompting the operator to check and deal with. After the fault is rectified, press the reset button to clear the fault before restarting the system.

When designing the PLC program, the high limit alarm signals of two calcined day use silo are led to the PLC program. Once the calcined day use silo material level exceeds the high limit alarm, the operator does not find it, and the program will automatically stop the system for protection.

2.4.3 Pulse vibration control of dust collector

There are three dust collectors in the petroleum coke transfer system. In order to prolong the service life of the pulse valve, based on the technical parameters of the manufacturer, the PLC program for the pulse vibration control of the dust bag of the dust collector is designed. According to the data provided by the manufacturer, timer and counter are used in the designed PLC program to precisely control the pulse vibration time and interval time of the dust collecting bag of the dust collector, so that the pulse valve can be vibrating in a fixed order.

3. Design of upper computer monitoring system

3.1 Characteristics of RSview Supervisory Edition (RSView-SE

As a member of Rockwell Software man-machine interface software product family, RSview-SE supports the core functions of HMI such as security, picture, alarm, operation and alarm record, trend and so on. It provides an integrated monitoring scheme for enterprises and is one of the mainstream PC monitoring software in the market at present. Widely used in metallurgy, chemical industry, petroleum, food, building materials, water treatment and other fields, favored by the majority of users. It mainly has the following characteristics:

Network-based distributed monitoring, shared development environment -- RSview Studio, enhanced Rockwell Automation preferred connection solution, direct I/O data association, transparent data integration, VBA support for picture objects, redundant hot backup for data communication, integrated Windows security.

3.2 Monitoring system design

Taking the above advantages of RSview-SE into consideration, this design selects RSVIEW-SE PC monitoring software to realize the operator PC monitoring of petroleum coke transfer system. RSVIEW-SE provides powerful project group function, project designers can use the existing graphic library, establish their own graphic objects, its modular design method, greatly improve the efficiency of project development.

The upper computer monitoring system includes the system process flow chart screen and PC console screen. On the console interface, all operation buttons are designed to prevent misoperation, and relevant buttons are centrally placed; Considering the convenience of operation, some of the equipment is designed with a single action button. On the process flow chart interface, in order to reflect the operating status of the field equipment, dynamic and static combination is adopted, different colors represent different states and the combination of plane and stereo to establish the upper computer screen. Operators can monitor and control the equipment running status and main process parameters of the whole process in real time, and can easily switch between the screen.

The state of the equipment is designed on the screen. Before the system starts, press the test light button, and the equipment that does not meet the start conditions will appear red light flashing. In this way, the maintenance personnel will directly go to the corresponding equipment for inspection and processing, saving the time of fault finding and improving efficiency.

4 Closing Remarks

Since the system was designed and debugged in August 2004 and put into operation, the system is stable, reliable operation, easy to use, high degree of automation, reduce the number of personnel, improve the work efficiency of the enterprise; And the system has a certain security protection ability, by the user's praise. At the same time, the system in the field maintenance, equipment adjustment and program modification are convenient to reflect the strong advantages, so it has a good application value.