IFM DTI921 handleiding
Handleiding
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Command
value
EPC length
EPC 0 to 15
Length new
EPC
Data
Block
counter
Status bit
"Cmd Start"
Command
value
Data 0to27
Block
counter
Error value
Status bit
"Cmd End"
Status bit
"Cmd Start"
Device ac-
knowledges
command
0x05 0x00 0x419
9
0x04 0x00 0x00 1 0x05 0x00 0x00 0x00 0 1
Controller
transmits new
EPC
0x05 New EPC for ID tag 0x01 1 0x05 0x00 0x00 0x00 0 1
Device ac-
knowledges re-
ceipt and
writes new
EPC
0x05 New EPC for ID tag 0x01 1 0x05 0x00 0x01 0x00 0 1
Device sets er-
ror value (in-
sufficient pow-
er supply of ID
tag)
0x05 New EPC for ID tag 0x01 1 0x05 0x00 0x01 0x64 1 1
Controller with-
draws com-
mand value
0x00 0x00 0x000
0
0x00 0x00 0x00 0 0x05 0x00 0x01 0x64 1 1
Device carries
out preset
command
0x00 0x00 0x000
0
0x00 0x00 0x00 0 0x00 Single
EPC
0x00 0x00 0 0
9.8 Operating mode "READ DATA
In the “READ DATA” operating mode more than 28 bytes can be read with a read operation. The data
is sequentially transferred from the device to the controller.
Transfer data from the device to the controller:
u In the process data output image, the controller sets
- the command value “0x06”,
- the address (16 bit),
- the data length (16 bit) and
- the memory bank with the values EPC: “0x01”, TID: “0x02”, USER: “0x03”, Reserved: “0x04”.
w To identify the ID tag, the EPC and its length are also necessary.
u The controller starts the read operation with the status bit “Cmd Start”.
w The device acknowledges the start of the read operation by setting the status bit “Cmd Start
Acknowledge” in the process data input image.
u As soon as the first data is available from the ID tag, the device transfers the data to the process
data input image (data 0 to 27) and increases the block counter by “1”.
w The controller acknowledges receipt of the data by increasing the block counter in the process
data output image by “1”.
u The previous two steps are repeated until all data has been transferred.
u The device sets the status bit “Cmd End” with the last transfer.
w The read operation is terminated.
If the operation was unsuccessful, the device sets the error value and the status bit "Cmd End"
in the process image. Data transfer is interrupted.
Byte Process data output Process data input
0 Command value = 0x06 Command value = 0x06
1 Status Status
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Productinformatie
| Merk | IFM |
| Model | DTI921 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3980 MB |
