ケーススタディ

relyon-plasma

Industrial plasma processes – modular configuration

relyon plasma implemented a CANopen slave interface using the IXXAT stack. When combined with Anybus X-gateway CANopen (master), relyon plasma can be used with any system configuration.
With HMS gateways, it is a cinch to embed our plasma plants into any fieldbus environment and have them communicate very reliably with the primary FIS (Factory Information System).
Dominik Burger, Manager R & D
relyon plasma GmbH

Application
Atmospheric plasma is one of the most efficient methods for treatment of materials to create ideal conditions for subsequent processes such as gluing, laminating or varnishing. Product quality is improved while increasing throughput and without using additional primers. Another important topic is the germ-reducing effect of plasma in the pharmaceutical industry and in food engineering.
An electric discharge can generate an intense atmospheric plasma jet in air streaming out of a nozzle. At relyon plasma, we use high-frequency pulses from a high voltage source and a nozzle designed specifically for this purpose.

Embedded into the system for excellent communication

Robust communication is essential for reliably controlling this type of high-performance system. Using a CAN bus, several plasma channels, temperature and pressure sensors, as well as mass flow controllers, can be connected in a production plant such as those used in the packaging industry. The CAN bus offers up to 127 addresses per node and delivers transfer rates up to 1 Mbit/s with 40 m or 500 kbit/s with 100 m cable length. Communication via CAN is outstanding in terms of tolerating electromagnetic interference.

Cross-vendor standard
In modern production plants, self-contained isolated solutions or analogue control system interfaces have long since ceased to be “state-of-the-art”.
Secure communication as a redundant system to the emergency-stop circuit is extremely helpful, not least for meeting the required performance level, risk classification according to ISO 13849 standard. The relyon high voltage source is capable of deactivating the active high voltage by way of a hard-wired emergency-stop circuit and the CAN interface.

In either case, communication and status monitoring continue without interruption.
The plasma system must be embedded securely into the primary control system design. To be sure, communication standards differ based on industry, region or type of plant control system used.

Although the open communication protocols DeviceNet or CANopen based on CAN are available, they are not supported by all control system solutions. For this reason, relyon plasma thought it was important to ensure that the plasma solution can be integrated
without problems into the respective plant network technology anywhere in the global market.

In no time at all it was possible to implement a wide range of solutions for integration, starting with a simple laboratory system controlled via CAN/USB module directly with a laptop, through to a fully automated production plant with central control system and continuous transfer of all process parameters to the factory information system.