PECS - Plastic Extruder Control System
The Control System for Extrusion Blow Molding
The PECS control system for extrusion blow-moulding machines is based on advanced but proven technology and is easy to use. It enables flexible machine design and quick start-up. The system makes possible to design blow-moulding machines with unprecedented precision, minimal material use and the fastest production cycle.
Due to the Mitsubishi advances in manufacturing technology and due to high productionvolumes, the Mitsubishi PLC’s can meet or beat the price of many competitor systems.
The PECS control system allows highly flexible configuration of hardware and software components. The PLC system is completely modular system, which could be optimized by the machine designer to reach the optimal price/performance level.
The machine parameters and data are organized as recipes. Their use ensures fast and efficient set-up of the new machine without excessive time consumption to configure and to parameterize the control system “from the scratch”. On the other side, the product recipes are used to help the end user to change the production in the shortest possible time.
The PECS control system can be used as a package for building new blow-moulding machines or as well as for retrofit machines.
Advantages of the PECS control packages
The human-machine interface (HMI) screens are already prepared and SPAC20 coprocessor modules are pre-programmed to execute the most demanding control algorithms. Everything is linked together by the PLC software to make the machine running in the shortest possible time. The user needs only to match the system to the specific configuration of the machine and to make final adjustments. Of course, one may make greater redesigns if necessary.
The main advantages of the system are:
- Modular PLC system, which can fit to different requirements and price/performance levels
- Standard PLC I/O modules support interfacing to all kind of control signals and to most of communication protocols.
- High-speed intelligent co-processor modules take the control of fast blow-moulding tasks. Dedicated control algorithms are pre-programmed and easy to use.
- Analog and digital I/O’s are included in the co-processor modules for fast and effective control of wall thickness and hydraulic motions.
- Powerful HMI terminal with color touch screen and function keyboard helps the operator to operate the machine in a user-friendly, efficient and safe way.
- Three types of recipes are available: machine data, product data and complete data.
- Several security access levels are possible.
- Multi-language HMI supports with up to 4 languages and different types of fonts (Asian fonts as well) are available.
Functions of the PECS Blow Moulding Control System
Mitsubishi Electric offers complete blow-moulding solutions for:
- Temperature control
Auto-tuning temperature control with pretune. - Parison control
Fast wall thickness control with simple profile programming. - Hydraulic control
Accurate open-loop or closed- loop motion control. - Sequence control
Standard ladder logic programming.
System Configuration
Three different powerful versions cover the overall range of applications of blow-molding technology: Basic, Standard and Professional. Maximum flexibility permits a very attractive price level.
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