3 years ago

Automation Technologies 2/2014

  • Text
  • Automation
  • Technologies
Automation Technologies 2/2014

Industrial communication

Industrial communication back to current issue 02 RFID transponders are available in a wide range of form factors piece) in front of the antenna. Simatic RF200, on the other hand, is a cost-effective RFID system that supports standard data media according to ISO 15693. The system is available in a version for IO-Link, which simplifies the use of the data in the PLC program. To employ RFID transponders and readers in industrial environments, the components have to meet certain requirements. For instance, a rugged construction with high degree of protection (IP65 or higher) is assumed so that dust, chemicals or humidity do not undermine the functionality. The connectivity of the readers has to meet the current standards, i.e. sturdy screw couplings, power supply with 24 V and integration into common bus systems, e.g., Profibus and Profinet. Different sizes, different ranges But the details of the solution also must be right. For transponders, the form factor and possible reading range are of great importance. With the MDS D117, a transponder is available that is just 4 mm in diameter and 5 mm in length. The new RF330T is a universal round transponder with 32 kB of storage capacity that can be flush-mounted into metal. The heat-resistant data storage MDS D339 in turn can be warmed up to 220 °C – and that several thousand times. Having a wide variety of readers and antennas is also advantageous. Especially with HF systems, the range and size are important parameters that often contradict each other. For instance, the new ANT 8 by Siemens is designed for an installation diameter of 8 mm. Its range, however, is hardly more than 8 mm — but for applications such as the identification of tools in machines, this represents an optimal combination. High-performance systems such as the reader RF290R in conjunction with the antenna ANT D10 achieve a range of up to 500 mm, but with significantly larger dimensions. This configuration, though, is exactly right for the capture of transport boxes on conveyors. AUTOMATION TECHNOLOGIES 2/2014

previous page Successfully implemented at VW That the concept of the RFID-controlled multi-variant production is successful in practice has been proved by numerous applications — e.g., in the transmission production at the Volkswagen plant in Kassel, Germany. At the infeed of the line, the identification number for the ordered transmission as well as the necessary recipe are written onto the tag and linked with a processing pallet number. The mobile data memory Simatic RF350T offers 32 kB of FRAM for this. After the corresponding instructions have been executed, the parts are inspected and acknowledgment-specific production and quality data (e.g., tightening torques and rotation angles for screw connections, slot widths) stored on the tag of the processing pallet. As a result, a complete documentation of the most important production and quality data is created during the production sequence, which at the end of line is transferred to the higherlevel MODEAS system for the long-term archiving and quality monitoring at Volkswagen. The transmission production planning of Volkswagen Kassel is fully satisfied with the new RFID system and considers itself well prepared for future challenges. Besides significantly reducing the cycle times, a greater flexibility of the production was achieved – enabling the efficient implementation of modern manufacturing models such as the just-in-sequence manufacturing with a “lot size of 1”. About Company name: Siemens AG, Division Industry Automation Brands: Simatic (among others) Headquarters: Nuremberg, Germany Turnover: 78.3 bn EUR (2012) Employees: 370 000 (2012) Products: Controller, Software, I/O Components, … AUTOMATION TECHNOLOGIES 2/2014 Igus.indd 1 03.04.2014 07:48:50