Corporate or local railway trains organisations operate a dispatching command centre, which comprises mainly the centre’s engine room equipment and dispatching room equipment. The dispatching room supervisory station can fulfil centralised dispatching functions, ensuring that the scheduler is able to remotely monitor the real-time operating status of the train operating under its designated area and actual station status from the dispatching room, including railway and inter-regional occupancy status, upcoming forks along the railway path, and signaller status. This is to facilitate the scheduler’s control of trains based on the actual situation, and the system also needs to provide some auxiliary functions to reduce the daily workload of the scheduler, which includes mainly:

•  Permission-based landing restrictions

•  Train management

•  Operating diagram management

•  Live train tracking

•  Planning management

•  Dispatching tasks

•  Dispatching order management 

Jiayuguan – Mongolia Railway under Jiuquan Iron & Steel (Group) Co., Ltd

The Jiayuguan - Mongolia Railway under the Jiuquan Iron & Steel (Group) Co., Ltd stretches from Jiayuguan North Station along the Jiayuguan Loop of the Lanzhou - Xinjiang Railway to the North Extension and extends to the Ceke Port of Entry, the junction of the Inner Mongolia Autonomous Region and Mongolia itself. The total route length is over 457 km, with a total of 11 stations, including many stations that are located in remote areas where communication signals cannot reach. The special line mainly supports the transportation of coal and ore to Jiayuguan North Station within Mongolian territory, and HollySys provided its client with a regional computer interlocking control solution. The transport personnel can monitor the regional railway stretch, the railway signalling equipment, or the location of the operating train from the control centre, enabling control of the signalling equipment of the different stations, achieving remote control of the train stations. 

The VSI 2oo3 computer interlocking system is an equipment that can operate continuously without maintenance, has complete auto-check capabilities, and is able to make timely discoveries of faults and carry out a looped-playback of voice alert information. At the same time, on the signaller's operating machine's interface, the alert information will be conspicuously displayed, and notify the signaller in a timely manner. The faulty modules of the VSI 2oo3 computer interlocking system can be replaced without the need to turn off the power supply. The electric service maintenance staff can detect the faulty module based on the alert messages. Once the equipment failure is addressed, the failure information will disappear from the operating interface. Using the HollySys 2oo3 computer interlocking equipment will significantly boost business efficiency, and save a lot of manpower and logistics. It has no history of breakdowns even after operating continuously for 6 years.

The RSS signalling microcomputer monitoring system is the excellent assistant of electrical service maintenance staff. Firstly, it is able to help the electrical service maintenance staff to rapidly determine the failure area. It uses the monitoring station’s network to access the status diagram to quickly determine the network where the fault is. Secondly, the system can help to address problematic failures. The monitoring station's playback function is able to determine the segment and time of the fault and the conditions that led to the fault by displaying that segment highlighted in red. Thirdly, the monitoring station is able to help search and further analyse the cause of the failure during the locomotive’s operation. If the locomotive committed a signal overrun or it was an operational error by the signalling operator, this can be analysed and determined by looking at the replay video of the situation from the computer screen at the monitoring station. It will be possible to record the operations of the operator and accurately record the actual timing-values of the operating locomotive, which helps in analysing the cause of accidents.     

Railway signalling computer interlocking system project of Daye Non-Ferrous Metals Group Holdings Co., Ltd.

Daye Non-Ferrous Metals Group Holdings Co., Ltd. is an integrated modern logistics enterprise that combines the businesses of railway transport, highway transport, waterway transport, and port transfers into a single entity. It has railway equipment such as 198 new diesel locomotives with an annual railway transport capacity of 4mn tonnes. To adapt to the company's major growth requirements, their railway transport department uses HollySys' independently designed and produced VSI2000 double 2oo2 computer interlocking system, which is equipped with HollySys' railway scheduling command system, where the respective station has 43 fork sets and 85 signallers, and their usage commenced in Mar 2011. Upon the opening of the line, the system not only ensured train safety, but also improved work efficiency and reduced labour intensiveness. It was also aided in providing clients with better integrated logistics services, reduced logistics costs, and further improved Daye's overall competitive edge. These were the benefits after adopting the system: 

•  Significant leap in safety and reliability

The HOLLiAS VSI double 2oo22 computer interlocking system is a special computer that was developed by HollySys for railway systems, which is in line with the TB/T 3-27 - "Computer Interlocking Technological Requirements" issued by the Ministry of Railways (MOR). The system uses and combines the company's established knowledge in aspects such as the nuclear power and automation industry's advanced computer failure-tolerance technology, redundancy technology, error avoidance technology, safety technology, and failure shielding technology. Under abnormal conditions, it is able to guide the system from system faults to safety, ensuring the safety of the trains. The VSI double 2oo2computer interlocking system equipment comes with lightning protection functions. Before Daye Non-ferrous' station was installed with the computer interlocking system, they used manually controlled fork switches for their railway transport operations, which resulted in 5 to 6 train accidents every year. Since installing the HollySysHOLLiAS VSI double 2oo2computer interlocking system, no accident has happened.

•  Significant increase in task efficiency

The HOLLiAS VSI’s double 2oo2computer interlocking system is able to complete automatic fork switching within the operating train cabin, and a station can have many incoming roads at the same time. The location of the train on site can be captured very clearly on the operator panel. Installing the computer interlocking system can more than double the efficiency.

•  Introducing a informatization& computerised network system into train operations

The HOLLiASdouble 2oo2computer interlocking system can easily combine computers with communications technology to conveniently achieve centralised scheduling, achieving functions such as platform radio dispatching and regional interlocking. 

•  Improves the working conditions of employees and makes management more convenient

The HoLLIAS VSI double 2oo2computer interlocking system conducts train scheduling tasks based on the operational status, and independently operates and shuts off forks, providing guidance for the receiving of trains or the overall fully locked receiving of trains. Some stations can conduct single-hook humping, store humping paths, and are able to perform the functions of checking, maintaining, adding hooks, and reducing hooks. The duty personnel can monitor on-site operations on the screen. The on-site fork can be automatically set to its correct position based on interlocking orders, and automatically check whether the position is correct or tight. The signal shall be automatically sent after the relevant conditions have been checked, and the switchman does not need to manually control the fork junction one by one. There will no longer be a need for an employee to be stationed outdoors to man the coupling controls, which reduces labour intensity and saves a lot of manpower.

The DSS railway operation dispatching supervision system is generally used in higher-level systems (scheduling centre), including servers, scheduling supervision terminals, engineer stations/system maintenance stations, and display terminals, mainly comprising functions such as dispatching supervision data retrieval, storage, processing, analysis, display, query, alert, system maintenance, and recovery of historical data. From the system status interface, we can directly observe the operating status of the different station equipment below. If a certain station's equipment encounters any failures, the system interface would show it as an abnormality in that station. The data exchange system shall complete the data exchange between the dispatching supervision slave computer and the dispatching supervision master computer. The train station slave computers include an instruction control unit (ICU), input control module (ICM), input separator plate and data acquirer system, fulfilling the data acquisition, transfer, and sending functions of the station. 

The DSS railway transportation and dispatching supervision system’s graphical content can be customised based on the user’s requirements. It displays in real time the data of every station at the dispatching centre, and also displays the station’s semi-automatic data, especially the station’s and inter-station regional data on the big screen of the dispatching centre in real time. In the past, it would be necessary to find out more about the situation at the different stations by making a phone call to the operators on duty at the designation stations, and there was reliance on the scheduler’s familiarity and experience with the company’s railway operating network to carry out train scheduling. However, the introduction of the system changed that. The system operates smoothly, is easy to maintain, is cost-effective, fast and significantly improves work efficiency.