The Tunnel Traffic Comprehensive Solution Controlled by Coolmay PLC HMI All-in-One
Summary
The comprehensive control of tunnel traffic is to use the
good Internet and bus networking characteristics of PLC to network all the
electrical equipment in the tunnel to achieve comprehensive control and state
monitoring at various points. It may be required to achieve intelligent,
integrated, remote and and unattended controlled. Compared with the traditional
tunnel control scheme, the construction and wiring project is simpler and the
fault handling is more intelligent and quicker.
Solution selection
CX3G-16MT-485/485（PLC）
EX3G-100HA-16MT-485/485-W（all
in one）
CX-FIBER-A,CX-FIBER-B（Fiber
module)
CM540-11K(Various Frequency converter)
Program
implementation
Due to the long tunnel length and related technical
requirements, the project uses RS485 networking and fiber modules as relays.
The scheme determines to control each slave station PLC to achieve precise
control by communication mode. The slave station is divided into meteorological
data acquisition and frequency converter control, traffic signal light control,
drain control, and video real-time acquisition.
Scheme system diagram:
System monitoring
screen
PLC control related
programs
Program features
* Adopting RS485 networking o realize communication,
communication is stable and communication distance is long, and
anti-interference ability is strong. Since the terminal slave station is far
away from the control room , so we add the communications relays (fiber module),
to solve the influence of the wiring structure and the loss of communication
lines when rs485 communication.
* The carbon monoxide in the tunnel is automatically
monitored, and the fan is linked to automatically adjust the air quality in the
tunnel.
* The drainage system in the tunnel automatically turns
the pump on /off by real-time monitoring
the water level in the sump.
* Two meteorological data collection points are arranged
in the two channels to real-time collect the wind direction and wind speed of
the tunnel mouth, and display the weather conditions and traffic conditions in
the tunnel in advance through the display screen.