July 9, 2014 | Bretislav Valek
The metering system comprises two 20” meter runs with ultrasonic gas flow meters communicating via the Modbus RTU protocol (RS-485). Each meter run has a capacity of 100 % for custody transfer metering.
Note: Meter run = a piece of pipe that is equipped with all necessary instruments for custody transfer flow metering
Each meter run is equipped with the following elements:
The elements of each meter run are wired to the flow computing, monitoring, and supervisory cabinet, which is installed in the control room. The supervisory software – Reliance SCADA/HMI (Reliance Control Server) – is installed on the main server and displayed on the control panel.
A client PC and two printers are located in the operator's room. The client PC is equipped with client supervisory software (Reliance Control) and is connected to the server through
a redundant Ethernet link. The software has different access levels, which protect the system against unwanted access. Required field and calculated signals are transferred to the distributed control system. The system is equipped with a Siemens SIMATIC S7-300 PLC to control the operation of the motor-operated valves.
The Reliance SCADA system provides the following functionality:
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 gas metering station in Shurijeh, Iran
Delta Gas Mobin Group
Siemens SIMATIC S7-300
1 x Reliance 4 Design Enterprise with 1,000 data points
1 x Reliance 4 Control Server with 250 data points
1 x Reliance 4 Control with 250 data points