Caen RFID Easy2log RT0005, Техническое руководство, Страница: 29 / 38

easy2log© RT0005 Technical Information Manual 29
BIN_ENABLE = 0x000F
The Threshold value register shall be filled with the example value:
BIN_THRESHOLD[0] = 0x0000
BIN_THRESHOLD[1] = 0x0003
BIN_THRESHOLD[2] = 0x0002
BIN_THRESHOLD[3] = 0x0001
The sampling interval time, expressed in minutes, must be converted in seconds for the correct setting of the
BIN_SAMPLETIME register:
Min. Sec. Register
15 900 BIN_SAMPLETIME[0] = 0x0384
10 600 BIN_SAMPLETIME[1] = 0x0258
5 300 BIN_SAMPLETIME[2] = 0x012C
1 60 BIN_SAMPLETIME[3] = 0x003C
In this example, the samples have to be stored in the user memory hence the BIN_SAMPLE_STORE register flags have
to be set for the corresponding bins:
BIN_SAMPLE_STORE = 0x000F
The samples' timestamps do not need to be saved (it is not required by the example) hence the BIN_SAMPLE_TIME
register's flags shall be disabled:
BIN_SAMPLE_TIME = 0x0000
The Mean Kinetic Temperature and the Shelf Life registers can be left to the default value since we don't need to use it.
In order to activate the tag and put it in Idle state the initial date configuration register (INIT_DATE) shall be written
with a non-zero value and the tag shall be reset using the dedicated bit in the CONTROL register. In this state the
internal clock is active and the tag is waiting for a start logging command (LE in the STATUS register).
Once the LE bit toggle to 1 (start logging) the tag wait for the SAMPLING_DELAY expiration (if the Delay Enable flag is
enabled and SAMPLING_DELAY is different than 0) then it starts the acquisition of the temperature samples.
During the acquisition the tag samples the temperature each BIN_SAMPLETIME[x] seconds (where x is the bin index
corresponding to the last temperature sample).
Let now suppose that the temperature has been sampled more than 3 times in the first bin; in this case an alarm must
be generated. The status of the register will be:
STATUS = 0x0013 (BIN_ALARM flag active and battery status Full)
BIN_ALARM = 0x0002 (alarm flag set corresponding to the first bin).
BIN_COUNTER[1] = 0x0003 (3 samples counted in the first bin)