IFM DTI921 handleiding
Handleiding
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42
Value (hex) Value (binary)
Selection start bit 4
Selection length 1
Selection mask 0x3B 0b00111011
Data on the ID tag 0x34 0b00110100
An EPC code must be specified for the following operating modes:
- READ DATA (Ò Operating mode "READ DATA/29)
- WRITE DATA (Ò Operating mode "WRITE DATA”/32)
- WRITE EPC (Ò Operating mode "WRITE EPC”/26)
- LOCK DATA (Ò Operating mode "LOCK DATA”/35)
This allows an ID tag to be accessed if it has been filtered out by selection.
9.13.3 RSSI filter
The RSSI filter spatially classifies ID tags based on their received signal (RSSI). A typical application
is the limitation of the spatial detection area.
A minimum and a maximum RSSI value are set for the RSSI filter:
• high RSSI value: the ID tag is close to the device,
• low RSSI value: the ID tag is further away from the device.
ID tags below the minimum and above the maximum RSSI value are filtered out.
The measurement of the RSSI value of an ID tag is influenced by the
u environment and any reflections that may be present,
u movement of the ID tag during the measurement.
9.13.4 Reading and writing ID tag data
The device provides several methods for accessing the data of an ID tag:
• The operating modes "READ DATA AUTO" and "WRITE DATA AUTO" process the ID tag data
independently and then display it in the process image. The length of the data and its address are
determined beforehand. The device then automatically reads or writes the data as soon as an ID
tag is detected. The amount of data is limited by the process data width of the IO-Link interface to
max. 28 bytes.
The operating modes "READ DATA AUTO" and "WRITE DATA AUTO" read and write all
detected ID tags. The ID tags are not distinguished on the basis of the EPC data.
• The other operating modes process the ID tag data on a one-time basis according to the user's
instruction. The EPC data determines which ID tags are read or written. When transferring more
than 28 bytes, several IO-Link process data cycles are used. The data is synchronised with block
counters ("READ DATA" operating modes).
The ID tags are divided into several memory banks:
Memory bank Description
EPC The Electronic Product Code is used to detect ID tags.
TID The transponder ID is a unique, non-changeable identification
of the ID tag.
USER The memory bank USER can be freely used for the user's da-
ta.
RESERVED The memory bank RESERVED contains configuration data of
the ID tag and cannot be used by the user.
Bekijk gratis de handleiding van IFM DTI921, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | IFM |
| Model | DTI921 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3980 MB |
