concrete batching plant, is material storage, metering, mixing in one medium-sized concrete mixing equipment. The device uses HAOMEI Machinery Co., Ltd. production JS1000 twin shaft cement mixer, PLY600 type batching controller automatically measured using sand and gravel aggregate belt conveyor, screw conveyor powder using LS219, the whole power of 108KW, productivity theory 60m3 / h. The device is a small footprint, installation and easy operation. Use the Ping head of projects and construction bureau Ludila situation to good effect, the actual production process per day up to 848m3.
The control system
HZS series of automatic control system is composed of the host computer, signal conversion interface, programmable logic controller (PLC) and batching controller (PLY600) components. Between units use standard RS232 serial communication port for communication, control system uses a centralized manner the main elements of the mixing device direct control, all analog signals, digital signals, output signals are controlled by a programmable controller (PLC) and host computer unit is linked, the host computer provides production management capabilities and screen operator interface.

1.1 host computer
The host computer using Windows2000 operating system, installed Taian letter Automation Systems, LLC developed “Kingview” monitoring software, to provide users with actionable interface, the user interface to set the required ingredients in the production process various parameters to complete the initial setup for each unit, storage list of ingredients, each unit receives signals transmitted anomaly, an alarm signal and treatment measures to the user, automatically statistics data, in tabular form to print and data archiving.
1.2 PLC PLC
Automatic control of the core part, the choice of Siemens CPU224, pre HAOMEI Construction Machinery Group Co., Ltd. write PLC control program. According to various signals received by the internal operation is determined, the output of the corresponding instruction, controls the entire concrete mixing production process. Each input and output ports are status indicators, can be counter-intuitive to the current operating status of the port.
1.3 Batch plant Controller
The system uses Shandong Bo-seok developed PLY600 type batching controller with automatic compensation gap, said automatic calibration, fault alarm, sensor connection detection. Using a standard RS232 serial communication protocol interface, real-time output weight data, synchronization significantly on the host computer screen.
1.4 Power System
Mixing machine power system equipment, screw conveyors, belt conveyors, pumps, additive pump, air compressor motors and other equipment, using PLC- relay – contactor – motor control, the use of circuit breakers for each load branch short circuit by thermal relay for overcurrent and phase loss protection.