Zhejiang University Central Control System

1. OOS (out of service) should mean offline, right? It doesn’t work. 2, which means a simulated switch. It’s generally used just for fun. All of them? It’s so annoying when everything is 0. 3. I can’t understand what exactly you are asking.

Then the simulation is not very useful either? The inlet pressure of the compressor is transmitted to the DCS, and the value displayed on the interface remains constant at 0.2. However, when the pressure dialog box is opened, an original value is shown, fluctuating around 0.5, which is correct; there is no forced false signal at this point. Then why does the value displayed on the interface remain 0.2?

This post was last edited by 49205455 on 2019-5-4 12:08. The simulation of Zhejiang University’s Central Control System does not involve setting fake values. Each DCS has a different name. Setting a fake value in Zhejiang University’s Zhongkong DCS is called manual value setting. Simulation is just for fun, used for demonstration, and has no practical use. If a certain point is manually set, a SET alarm will be displayed. As for the third question you mentioned, I still haven’t figured it out. It would be best to have photos to see what the situation is like. Logically, even if fake values are set, it makes no difference whether it is displayed or not.

There are internal software tools that can simulate controllers; things like Siemens’ TIA Portal represent a fairly conservative approach, and engineers don’t make such tools available to you

The value displayed on the interface remains constant at 0.2, but when the pressure dialog box is opened, an original value shows fluctuations around 0.5, which is correct. It’s necessary to check whether the tag numbers referenced in the interface are accurate

OOS is offline; it’s possible to disable a certain component. Simulation has not been used yet, but simulation software is available for purchase at the control center. The third issue requires images

The Zhejiang University Stable System – you might want to take a look; phone number: 13405869073

Check whether the point tags associated with your diagram match the data items; verify this in every location. If the value displayed is 0.2 when the panel is set to 0.5, it means the points being used for binding are incorrect

There are two types of DCS control system simulation: one is simple simulation, which involves using the simulation software packages provided by various manufacturers to carry out dynamic simulation of flowcharts and programs. Advantages: The program handling and interface operation are the same as those in actual production; the required software and hardware are simple, resulting in low one-time investment costs. Disadvantage: Each circuit does not have data sources that correspond to the actual operating conditions; at best, it is possible to infer fake input signals based on the output values to use as input values. System composition: It varies slightly among different manufacturers. Typically, software requires only one simulation package; in terms of hardware, some manufacturers need just one PC to simulate multiple controllers and operation stations, while others require multiple PCs to simulate several controllers and operation stations. Summary: It is only used to help operators become familiar with the operation methods of the DCS system, and it has a low cost of investment. Another type is process simulation, commonly known as an Operator Training System (OTS). The main difference between this type of simulation and the first one is that it incorporates a factory production model that is identical to the actual operating conditions. Advantages: Based on the inputs from a factory production model that mirrors actual operating conditions, operators carry out corresponding actions. OTS can adjust internal pressure data, temperature data, and so on according to the operating characteristics of an actual factory, thereby simulating the overall operating environment of the factory’s production equipment. Disadvantages: High investment cost; the cost of an OTS system is usually in the millions or even higher. The simulation results depend on the modeling software, and a tuning period is required to make the results as accurate as possible to reality. The system has a complex structure. System composition: Varies slightly among different manufacturers. In brief, it requires a process plant model software package (which may be provided by a manufacturer other than DCS), OPC interface software, simulation software packages from DCS manufacturers, engineer software packages, operator station software packages, etc. In terms of hardware, it consists of five PCs: a process plant station, an OPC station, a simulation engineer station, a simulation operator station, and a simulation field control station. Summary: The investment cost and technical risks are high, but repeated training can be conducted for the normal operating conditions as well as emergency and hazardous situations in factory production. The configuration for both types of simulation is the same as that used in actual engineer stations, but usually the real project configuration can be imported directly, without the need to create a separate simulation configuration.

Perhaps the reference to the point is incorrect