DTI420 DTI421
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9 Parameter setting
The parameters of the device are set using a software via IO-Link (for example ifm moneo configure
SA).
More information can be found in the IODD of the unit:
9.1 Parameter
9.1.1 Data block size
The memory area of an ID tag is organised in data blocks. The parameter specifies the size of a data
block. The set value must correspond with the value of the ID tag indicated in the data sheet.
The following values are permissible:
4,8,16 and 32 bytes per block.
The data block size is only required for the internal data processing in the device. The user can
access the process data images byte by byte on the memory area of the ID tag.
9.1.2 Data alignment
The parameter sets the order of the data in a data block of the ID tag.
Example
For an ID tag with block size 4 bytes the data can be ordered as in the tables:
Data block 0
Data block 1
Byte 3
Byte 2
Byte 1
Byte 0
Byte 3
...
Tab. 1: Normal order
Data block 0
Data block 1
Byte 0
Byte 1
Byte 2
Byte 3
Byte 0
...
Tab. 2: Reversed order
9.1.3 Data hold time
The data hold time indicates the time during which the data of the process data input image can be
held constant. Depending on the operating mode, this concerns
•
the UID,
•
the "Tag present" bit,
•
the data in Auto read and Auto write mode.
The parameter “Data hold time” does not influence data transfer in the operating modes "Read data"
and "Write data".
Example
When the data hold time is set to 500 ms, the UID and the "Tag present" bit are transferred for min.
500 ms via IO-Link.
This also applies if the ID tag is no longer within the range of the device.
