Open Commands; The Open Web Net Code - LEGRAND 675 20 Notice D'installation

9 - Open commands

9.1 - The open web net code

This is a protocol used to swap data and send commands between a remote unit and the Legrand
SCS systems. The protocol has been devised to be independent of the means of communication
used, considering as a minimum requirement the possibility of using DTMF tones on a normal
telephone line.
The code consists of a structure with variable length fields separated by a special character (*)
and closed with (##).
The logical structure is the following:
WHO = determines the type of function or type of system in the house that is interested in
the message transmitted; may be of the SCENARIO type (various resources in the
house are managed according to the user's needs), LIGHTING type (management of
the lighting system), CONTROL UNITS type (management of the automatic systems),
ALARMS type (burglar-alarm management) and AUXILIARY type (management of the
auxiliary devices).
WHAT = determines the operation to be executed (e.g. (ON, OFF, UP, DOWN), etc.)
WHERE = determines the aggregate of objects involved (e.g. a zone, a group of objects, a specific
environment, a single object, etc.)
WHEN = specifies the time period or link to a particular event (e.g. auxiliary command)
The type of commands that can be achieved are the following:
• ACTIVATION / DEACTIVATION:
– lighting;
– automation;
– temperature control
– burglar alarm;
– scenarios;
– auxiliaries.
• CHECK: – burglar-alarm status;
– status of an SCS actuator (only in case of lighting and control unit functions).
*WHO*WHAT*WHERE*WHEN##
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