IFM Electronic Identification systems
The constant increase of the degree of automation in modern production plants is increasingly supported by identification systems. Their tasks include for example the control or release of production steps or the assignment of information about each product. The RF identification 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. It is also the first RF identification system for AS-interface worldwide. It allows reading and writing of code carriers (ID tags), benefiting from the advantages of AS-interface. It can be integrated into existing AS-I networks without problem and is immediately ready for operation.
For reading, the RF identification system uses the AS-i analogue protocol 7.4 for data transfer. Special software modules are not required. 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. The voltage is supplied via the AS-i network via a rotatable M12 connector. No additional operating voltage required. The ID tag (transponder) provides flexible mounting options for workpiece carriers, tanks etc. The code length is 15 bits.
Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. The tags contain electronically stored information. Unlike a barcode, the tag need not be within the line of sight of the reader, so it may be embedded in the tracked object.
Advantages of radio frequency identification:
1. Overwriting. These RFID tags are overwritten and supplemented many times, while the data on the barcode is unchanged - they are recorded when printing.
2. There is no need for being in the field of view. An RFID reader does not require a direct visibility of the label to read its data. The mutual orientation of the label and the reader does not matter. Labels are read through the packaging, which makes possible a hidden placement. To read the data, it is enough to get to the registration area, including when traveling through it at high speed. A barcode reader always needs a direct bar code reader to read.
3. Bigger reading distance. The RFID tag is read at a much larger distance than the barcode. Depending on the model of the tag and the reader, the reading radius is up to several tens of meters.
4. More data storage. An RFID tag can store much more information than a barcode. Up to 10,000 bytes can be stored on a chip with an area of 1 square centimeter, and bar codes contain 100 bytes (characters) of information, for the reproduction of which you need an area of A4 sheet size.
5. Support for reading multiple labels. Industrial readers can simultaneously read dozens of RFID tags per second using anticollision function. The bar code reader can scan only one barcode at a time.
6. Reading the label data at any location. For automatic bar code reading, standards committees (including EAN International) have developed rules for placing barcodes on commodity and shipping packaging. These requirements do not apply to radio frequency labels. The only condition is finding a label in the scanner's area of operation.
7. Environmental influences resistance. RFID tags have increased strength and resistance to hard working conditions, and the barcode is easily damaged (for example, by moisture or contamination). In applications where the same object is used countless times (for example, in the identification of pallets or returnable packaging), the RFID tag is an excellent identification tool, since no placement on the outside of the package is required. Passive RFID tags are unlimited.
8. Intellectual behavior. An RFID tag is also used to perform other tasks, in addition to being a data keeper and transporter. The barcode has no intelligence and it simply stores the data.
9. Security. An unchangeable number-identifier, assigned to the label in production, guarantees the protection of marks from forgery. The data on the label is easily encrypted. As a digital device, the RFID tag, if necessary, is protected by a password of the operation of writing and reading data, and is encrypted. In one label, you can store both open and closed data at the same time.