IFM DTI921 handleiding
Handleiding
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DTI801 DTI901 DTI911 DTI921
23
Byte Process data output Process data input
31 ignored Error value
9.5 Operating mode "EPC REPORT
In the operating mode "EPC REPORT", the device generates a message when an ID tag enters
(arrival = 1) or leaves (arrival = 0) the detection field of the device. With each new message
• the EPC of the ID tag is output,
• the received signal strength (RSSI) is output and
• the block counter is incremented.
The message is transmitted as a process value until the controller confirms the block counter. The
controller confirms the block counter by mirroring the block counter value in the output image. If there
is no confirmation, the message is automatically confirmed after the data hold time has expired and
the new message is transmitted.
The rapid changing of ID tags generates many messages in a short time. If these messages are
transmitted too slowly, the result will be a "buffer overflow". This is indicated by the
corresponding bit in the status byte.
u Confirm the controller actively by mirroring the block counter.
w As a result, messages that are not transmitted fast enough are retained.
The RSSI value is a signed integer value. For example, "0xD6" corresponds to the RSSI value
"-42 dBm".
The operating mode does not use the following status bits (Ò Status bits/18):
- Cmd Start
- Cmd Start Acknowledge
- Cmd End
Byte Process data output Process data input
0 command value = 0x03 command value = 0x03
1 Status Status
2 ignored RSSI
3 ignored length of EPC
4 ignored EPC 0
5 ignored EPC 1
6 ignored EPC 2
7 ignored EPC 3
8 ignored EPC 4
9 ignored EPC 5
10 ignored EPC 6
11 ignored EPC 7
12 ignored EPC 8
13 ignored EPC 9
14 ignored EPC 10
15 ignored EPC 11
16 ignored EPC 12
17 ignored EPC 13
18 ignored EPC 14
19 ignored EPC 15
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Productinformatie
Merk | IFM |
Model | DTI921 |
Categorie | Niet gecategoriseerd |
Taal | Nederlands |
Grootte | 3980 MB |