Concrete Plant Control Systems

Automatic Concrete Production System

LIAD's concrete production system (LIADCON) is a combination of software and hardware that manages production of concrete mixtures via computer and controller. The system integrates preparation and production of concrete mixtures, including measuring out the correct quantities of each material according to recipe, and discharging them into the mixer or truck, while taking into account humidity conditions (material-water compensation), maximum weight capacity, and material flows. All this is performed quickly, accurately and without any operator intervention, while continuously updating the system in real time.

The LIADCON is operated by a Siemens programmable controller (PLC), which is connected to the electrical system from one side, and the computer from the other side. This configuration enables control and management of valve, feeding screw, and conveyer belt operation according to the desired recipe.

The system also integrates the whole spectrum of production management, from job order schedules and shipping dockets, to material inventory management and production report generation.

Features (Hardware)

·        Based on Siemens programmable controller (PLC)

·        The standard system can control four weighing channels

o    Aggregates

o    Cement

o    Additives

o    Water

·        Additional weighing channels available according to request

·        Can manage 40 different materials.

·        Can manage recycled water.

·        Connection to moisture meters and auto compensation.

·        Connection to all plant types (belts, screws, elevators).

·        Recording all system operations including manual operations.

·        Splitting mechanism for small plants.

·        Flow control of materials in order to obtain a better mixture.

·        Loading and unloading definitions for every recipe.

Advantages:

·        Very high accuracy by self-learning of material behavior.

·        Very high loading speed.

·        Definition of load order enables control of concrete quality.

·        Full automatic operation without operator intervention.

·        Permission and password system for parameters and recipe changes.

·        All operations pass through the controller.

·        Standard well-known PLC (Siemens) with standard cards provides flexibility for changes and gives the user accessibility to spare parts without dependence on the supplier.

·        The use of integrated weighing cards prevents the need for recalibration in the event of a card fault.

Technical specifications (standard)