File : CS-SUP-MUTI-WTHERMAPP-E01.sxw
7.4.4 Index logging in time steps
This type of datalogging is used to log the index value for each input at periods ranging from one
minute to over thirty hours. The time of the first logging may be set with a parameter.
When the datalogging mode in time steps is enabled, the system only logs the memorised index
values as soon as the preset time is attained; and this until the datalogging mode is disabled.
The parameters to be used, are the following :
measurement period of the datalogging in time steps
(parameter 0x80)
start hour of the datalogging in time steps
(parameter 0x81)
These parameters must by initialized before activating the datalogging mode.
The format of the applicatives commands for reading and writing internal parameters, is described
in chapter 6.2.
➢
Measurement period of the datalogging in time steps
(parameter 0x80)
Measurement period of the datalogging in time steps (parameter 0x80)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
[b7:b2] : measurement period expressed in time units
min : once a minute
max : 63 times 30 minutes = 31 h 30 min
[b1:b0] : time unit
00 : 1 minute
01 : 5 minutes
10 : 15 minutes
11 : 30 minutes
➢
Start hour of the datalogging in time steps
(parameter 0x81)
This parameter allows to synchronize the periodic measurement. It is expressed in multiples of hour, and its
value must set from 0 to 23.
When the datalogging mode in time steps is enabled, the system only logs the memorised index
values as soon as the preset time is attained
Example :
a user wants to log the temperature every 4 hours. And the first value mus be log at 19:00.
•
Parameter 'measurement period of the datalogging in time steps' (0x80) = 0x23
•
Parameter 'start hour of the datalogging in time steps ' (0x81) = 0x13
•
bits [b3:b2] of 'Operating Mode' byte (0x01) set to '01'
WaveTherm modules – application handbook
page 43 of 65
