File : CS-SUP-MUTI-WTHERMAPP-E01.sxw
7.6 MANAGEMENT OF THRESHOLD ALARMS
The
WaveTherm
module may be configured to detect when the values exceed threshold levels (high or low).
Three types of threshold alarm detection methods may be programmed :
immediate threshold alarm detection
threshold alarm detection for a given continuous period of time (successive mode)
threshold alarm detection for a total period of time (cumulative mode)
7.6.1 Description of the parameters used
Each sensor has its own parameters, which are as follows:
High threshold alarm,
High threshold excess time,
Low threshold alarm,
Low threshold excess time,
selection of the threshold detection mode (immediate, successive, or cumulative)
A parameter common to both temperature sensors allows to regulate the measurement period
used for the detection. (parameter 0x23)
Note
: The WaveTherm – PT100 and PT1000 may be configured with a precision level offering a more
reliable measurement even in environments with excessive interference.
Parameter
number
Description
Size
(in bytes)
Access
Right
Default value
0x01
Operating Mode
1
R/W
Depending of the
module used
(see 6.1.5)
0x0C
Precision level of the measurement
1
R/W
0x00
0x23
Measurement period of the threshold detection (in minutes)
1
R/W
0x00
0x15
High Threshold Alarm – Sensor 1
Cf. 6.1.2
R/W
Cf. 6.1.2
0x16
Low Threshold Alarm – Sensor 1
Cf. 6.1.2
R/W
Cf. 6.1.2
0x17
High Threshold Excess Time – Sensor 1 (multiple of the
measurement period of threshold detection)
1
R/W
0x04
0x18
LowThreshold Excess Time – Sensor 1 (multiple of the
measurement period of threshold detection)
1
R/W
0x04
0x2B
High Threshold Alarm – Sensor 2
Cf. 6.1.2
R/W
Cf. 6.1.2
0x2C
Low Threshold Alarm – Sensor 2
Cf. 6.1.2
R/W
Cf. 6.1.2
0x2D
High Threshold Excess Time – Sensor 2 (multiple of the
measurement period of threshold detection)
1
R/W
0x04
0x2E
Low Threshold Excess Time – Sensor 2 (multiple of the
measurement period of threshold detection)
1
R/W
0x04
According to the type of the module used, the default value of the high and low threshold are
different. Please refer to chapter 6.1.2 for more details.
WaveTherm modules – application handbook
page 56 of 65
