The constant increase of automation in modern production manufacturing plants is increasing the need for identification systems. Their tasks include, for example, the control or release of production steps or the assignment of information about each product. The radio frequency identification (RFID) system from ifm electronic is a compact and easy alternative for applications in which, for example, optical identification is not possible due to the ambient conditions.
The RFID system for AS-interface allows reading and writing of code carriers (ID tags), benefiting from the advantages of AS-interface. It can easily be integrated into existing AS-i networks and is immediately ready for operation. For reading, the system uses the AS-i analogue protocol 7.4 for data transfer. Special software modules are not required and up to 31 read/write modules can be connected to one AS-i master. The read/write head stores transmission errors which can be retrieved for a targeted fault analysis. Antenna, electronics and AS-i interface are integrated in a compact housing with voltage supplied via the AS-i network from a rotatable M12 connector. With a code length of 15 bits, the ID tag (transponder) provides flexible mounting options for work piece carriers, tanks etc.
The RFID system generates a 125 kHz electromagnetic field for reading and writing of data. The electromagnetic field emitted by the antenna induces voltage in the passive ID tag (transformer principle). This activates a transponder which returns its code and processing of the code and transmission to the AS-interface are carried out via the read/write head. The advantages of the system include reliable data transfer in dynamic reading processes and very small ID tags. Ethernet, Profinet, and Profibus evaluation units are also available.
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