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Programming Manual Controller-Gateway-Station V1.0 R1.1
Page 60 of 77
20.
General 1-Wire / OWD functions
20.1.
Search-function 1-Wire Bus
The automatic search for new 1-Wire components can be performed in a selectable time window of 10-240
seconds. It is also possible to start a new search by command.
The 1-Wire Controller / 1-Wire Gateway uses two diverse search methods at different times.
20.2.
Entire scan for Power On
After switching on the controller, a complete component search is carried out. This search proceeds along the
component numbering of the 1-Wire devices. A DS18B20 has, for example, number 28H, a DS18S20 has
number 10H. In this example, the DS18S20 blocks are arranged in front of all DS18B20 blocks. The purpose of
this search is to identify all connected 1-Wire components very quickly after a Power On.
The entire scan can also be started manually with the
command SET,OWB,SEARCHALL
. After executing the
command, the order of the 1-Wire devices may change.
20.3.
Adaptive search during operation mode
While in operation, new components are searched cyclically and will then inserted at the first open position in the
internal block list. Usually, this means that a new device will be added at the end of the existing list and a new
"OWD" number is output.
If an OWD was deleted or moved from the list, the newly found 1-Wire device will now be written to that open
position in the list.
The cyclic adaptive search can be switched off or on by using the
command SET,OWB,SEARCH,0 or 1
.
The adaptive search is activated on state of delivery.
20.4.
Fixed component sequence after Power On
If you want the existing component sequence to be available even after a Power On, we recommend to save the
existing component list in the 1-Wire Controller / 1-Wire Gateway by using the push button "SAVE ALL OWD
PERMANENT".
After a Power On, the system checks automatically if components have already been saved and if so, restores
this list.
While in operation, a saved list can be loaded at any time using the push button "UPDATE OWD-LIST FROM
CONTROLLER". This overwrites the current block list.
