i-MARK 2 / i-MARK 3
USER MANUAL
VISIBILITY DELIVERED. PAGE 15 OF 55
3.3.3 Marker Field Test Tag
The i-B2L SL/EU is a test tag. It is intended the test the range of the marker field. This is needed in
order to set the current of the loop. The tag is equipped with an LED that blinks when the tag is in a
marker field.
Order code: 380 870
3.3.4 The i-Q8L Tag (Response Technology, Reader Talks First)
This tags never send out anything on their own, until they are asked for. Either by a scan command to
check for tags in the long-range RFID field or by directly addressing them by their unique tag ID.
So to interrogate and collect Marker information of let’s say tags somewhere in 4 tracks of the port of
a plant it is a good idea to use the “scan with data” command and give the ILR central unit the job to
get the tag IDs and the bytes that carry the Position Marker loop information from the memory of
several i-Q8L tags.
These are the mapped memory addresses of the Position Marker information in an i-Q data tag:
Address Type Description
0x0090 uint: 16 bits Previous Position Marker ID, LSB
0x0091 Previous Position Marker ID, MSB
0x0092 uint: 16 bits Time since this previous position had been left in steps of 1 sec, LSB
0x0093 Time since this previous position had been left in steps of 1 sec, MSB
0x0094 uchar: 8 bits Previous Position Marker 125 kHz RSSI value
0x0095 uint: 16 bits New Position Marker ID, LSB
0x0096 New Position Marker ID, MSB
0x0097 uint: 16 bits Time since this new position has been left in steps of 1 sec, LSB
0x0098 Time since this new position has been left in steps of 1 sec, MSB
0x0099 uchar: 8 bits New Position Marker 125 kHz RSSI value
Important Note
Be sure to read all 10 Bytes (length) at once starting address 0x0090 (offset) from the tag. Otherwise
you will not receive the correct data.
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