Installation of bunker scales for Oiltransterminal LLC

Primary goal:

• Install equipment that meets modern metrological requirements.
• Automation of the accounting system.
• Integration of hopper scales into the technological scheme.
• Scope of work:
• Development of design documentation for an automatic weighing system.
• Complete set of controls.
• Development of algorithmic support.
• Software development.
• Manufacturing of control panels.
• Installation of automation equipment.
• Commissioning works.

Technical means:

• Hopper scales ZEO-BV-200.
• Hydraulic station "Hydro Pneumo Apparatus".
• Load cells HBM HLCB 1C3/1.7T-1.
• Electronic weighing device HBM WE2108.
• Microcontroller FASWEL RTU-180.
• Ethernet to RS232 TIBBO converter.

The core of the measuring system is the WE 2108M measuring controller with an indicator, which receives information from the strain gauge and is converted into a digital signal. The weight value is transmitted via the RS 232 interface to the control controller to perform operations for discrete weighing of portions, batches, and the product being weighed and to the serial interface for further use on a PC. Weighing is carried out on serial bunker scales developed by Odessa Elevator Equipment Plant LLC, equipped with hydraulically driven valves. The RTU-180 microcontroller, in accordance with the algorithm, generates control signals that, with the help of a hydraulic station, influence the valve cylinders of the overhead and weighing bins of the scales.

The measuring controller has a settings menu, which displays all the necessary information about the state of the scales and allows calibration and calibration. The system software is implemented in 2 parts and consists of a lower-level program executed in the FASTWEL controller and a top-level program that runs on a PC in the server room.

The lower level program performs the following functions:

• cyclic polling of the status of the WE 2108 weighing terminal (every 200 ms);
• cyclic polling of the status of discrete latch position sensors;
• cyclic polling of the status of discrete level sensors in bins;
• cyclic polling of the status of the “Request for readiness” and “Unloading scales” signals generated by the SDAU system;
• generates a “Ready” response signal for the SDAU system;
• maintains a total (total) counter based on the weighing results, stored in an independent memory;
• responds to requests from the top-level program for discrete signals and the state of the total counter;

The top-level program performs the following functions:

• cyclic polling of the state of the weighing system (every 500 ms);
• visualization of scale operation;
• records information about completed shipments into the database;
• allows you to set the weight of the shipment, which is transmitted to the controller and stored in the non-volatile memory of the controller;
• records data on the shipment and status of sensors in exchange files (for transferring data to the SDAU system).

The delivery includes an automated workstation for the scale operator (Weighing Elevator Workstation), which maintains the appropriate database and processes information on the accounting tasks of grain receiving and grain processing enterprises.

The software meets all the requirements of State standards for operations, including export-import operations involving grain and its processed products.

Result:

Thanks to the implementation of this project, hopper scales:

• integrated into the remote automatic control system of the warehouse complex;
• the goods shipment report is integrated into the existing accounting application.

Customer comment

Period of cooperation:

In progress 2016-2017.