30
ATIM_ACW-THAQ_UG_FR_V1.7
WARNING
A received temperature of 0x8000 corresponds to a measurement error. This is often due to an improperly connected cable.
Alert measurement frame
If the Timestamp is activated, 4 bytes with the Timestamp value will be preceded by the header (byte 1).
For each of the channels in alert a header is inserted and is constituted as follows:
The
Alert type
field is used to identify whether it is a breach of the high threshold, the low threshold, or a return
between the thresholds.
These values are defined as follows:
The measurement type field is here identical to that of the measurement frame (ie 0x08, 0x09, 0x0C or 0x0D in
hexadecimal for the ACW-THAQ).
The sample that triggered the alert is then inserted afterwards (with
Big Endian encoding
- MSB first)
Byte1 - Header
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
New
generation
= 1
Timestamp
Measure
ment
frame
= 0
Reserved
= 0
Alert frame
= 0x0d
Octet 2 Channel Header
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Alert type
Number of the channel
Measurement type
Value
Description
0x00
In between thresholds
0x01
Exceeding the high threshold
0x02
Exceeding the low threshold
0x03
Reserved
