File : CS-SUP-MUTI-WTHERMAPP-E01.sxw
7.5 ADVANCED DATALOGGING
When the WaveTherm support the Advanced Datalogging, the datalogging allows a periodic collection of
temperature measurements up to M temperatures. If two temperature sensors are used, then the
WaveTherm return the last M/2 values of each sensor.
WaveTherm – DALLAS :
M = 4500 temperatures;
WaveTherm – PT100 :
M = 2000 temperatures;
WaveTherm – PT1000 :
M = 2000 temperatures.
This functionality is principally used with the index logging in time steps, but it can be also used with index
logging once a weel, or once a month.
In the current firmware version, the Advanced Datalogging only supports the 'stop memory full'
mode. Thus the 'permanent loop' mode cannot be activated.
This chapter describes the following procedure :
Parameter setting of the Advanced Datalogging mode,
Reading of the logged temperature values,
re-initalizing the storage table, and re-starting a new datalogging cycle.
7.5.1 Description of the parameters used
According to the datalogging type ( time steps, once a week, once a month), some specific parameters must
be used.
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)
0x0A
number of loop of the datalogging storage table
1
R
0x00
0x0B
Number of temperature values stored in the table (LSB first)
2
R
0x0000
0x0C
Precision level of the measurement
1
R/W
0x00
0x80
Measurement Period (datalogging in time steps)
1
R/W
0x13
0x81
Start hour of the datalogging in time steps
1
R/W
0x08
0x82
Day of the week, or of the month (datalogging)
1
R/W
0x01
0x83
Time of measurement (datalogging once a week, or once a month)
1
R/W
0x08
These specific parameters must be initialized before activating the datalogging mode.
WaveTherm modules – application handbook
page 48 of 65
