Tunnel Valik together with a bridge across the Uhlava river belongs to the last section of the by-pass highway of the city of Plzen and D5 highway leading from Prague to Rozvadov. The control system for the tunnel was implemented by two Czech companies, GEOVAP and Teco. Tecomat PLC devices provide control of the tunnel. The Reliance SCADA/HMI system provides visualization of the tunnel and saves data from the operation.
Tunnel Valik with its 380 meters in length ranks among shorter constructions. But with its traffic density of more than 20,000 vehicles per day, it ranks among the constructions with the highest requirements for the equipment from the safety point of view.
The control room of the Police and Road and Motorway Directorate of the Czech Republic located in Svojkovice
The main control room, located 25 kilometers away from the tunnel, is equipped with two computer stations. The traffic in the tunnel is displayed on the screen (controller) mounted on the wall in the Police and Road and Motorway Directorate's control room. Reliance SCADA provides control of the traffic in the tunnel including the control of the overhead signs. The tunnel is controlled by seventeen Tecomat TC700 PLCs.
The implementation of the control system included the installation of a data server. This data server, with the Reliance Control Server software, is directly connected to the control computers in the main control room. The data server provides historical data that can be displayed on the screen in the control room, communication with other systems connected to the network, and data logging from the operation.
The large screen in the control room
An overhead sign displaying important information for the drivers
A picture of the Valik tunnel
Each PC workstation in the control room is equipped with two network cards for direct connection with the main and backup control systems of the tunnel. The Tecomat system is connected to each superior computer through a common physical network connection.
The Reliance SCADA/HMI system continuously provides communication with data sources and controls their validity. It visually informs of the condition of communication and data validity of each object by means of yellow or red frames. It also monitors which PLC in the tunnel is the primary or the backup one and, in case of their possible substitution, it automatically switches to the primary PLC. The system controller is informed about this substitution.
The system controller (screen mounted on the wall) has several view screens at his/her disposal. The traffic scheme is the basic scheme being used.
The top part of the screen includes:
The main screen includes:
The bottom bar is used for the monitoring and confirmation of all system messages.
The bottom part includes a number of buttons for switching to the following view screens.
Visualization of the tunnel traffic
Taking over of the command
Visualization of fire detection in the tunnel
Visualization of the tunnel lighting
Visualization of an overhead sign
Control system topology
Try the Reliance SCADA/HMI system on several example projects or download the installer of the trial version for free.
Visualization and control of the Valik tunnel
17 x Tecomat TC700
6 x Reliance Runtime Control with an unlimited number of data points
1 x Reliance Runtime Server with 10,000 data points