Comelit 20003150, Системное руководство

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7
To fully understand the system, it is vital to grasp what happens when a button is pressed or released (digital input closed or
opened); every time there is a change to an input, the corresponding module sends a message over the bus which, as mentioned
previously, can be destined for various recipients:
- a module and one or more of the outputs on it
- a group
- the system manager
If the recipient is a module, its serial number and one or more of the outputs involved should be indicated, while if it is a group, its
identification number should be indicated. Finally, if the recipient is a system manager, nothing else has to be indicated, as it is
always open to bus communication and will receive the command originating from the module, applying for example a programmed
scenario.
The type of command transmitted by a module can be classified as follows:
- NORMAL : the output(s) receive the message and, if it is compatible with their profile, are activated, otherwise their status does
not change;
- SET or RESET : the recipient output(s) are forced into action, regardless of how they are programmed, so if a RESET command
is sent, the output(s) are de-energised.
Analogue inputs, on the other hand, can perform the following functions:
- ONLY ON DEMAND :the module constantly reads and logs the input value (converted into a scale from 0 to 255), only sending
it when requested (by a system manager, for example);
- SEND STATUS AUTOMATICALLY : the module constantly reads and logs the input value (converted into a scale from 0 to 255),
sending it at regular intervals as specified;
- AUTOMATIC ACTIVATION ON SETPOINTS : if this function is used, up to 8 setpoints can be selected, meaning that when the
measured value exceeds or falls below these values a message is sent to a module/output, a group or the system manager, as
if it were a digital module;
- BCD ROOM THERMOSTAT : this function is suitable for temperature sensor (20046708) connection, for the correct reading
of the value in degrees Centigrade. At each pre-set time interval, the module checks the difference between the measured
value (with a resolution of 0.1°C) and the selected setpoint (summer/winter, day/night/room empty) and sends the activation or
deactivation command to a module/output.
DIGITAL AND ANALOGUE OUTPUT OPERATING PRINCIPLE
Each digital output has a function associated with it. When an output receives a "Normal" message from an input, it carries out the
programmed function; otherwise, if it receives a forced command (SET or RESET), it carries out that command regardless of the
function for which it was configured. Being multifunctional modules, different types of output are available on a programming level.
DIGITAL OUTPUT TYPES
MONOSTABLE
When the output receives an active input status (e.g. button pressed) it is activated, when it receives an
inactive input status it is deactivated (e.g. doorbell or bathroom pull-cord).
STEP BY SETP
When the output receives an active input status (e.g. button pressed), it changes its own status in turn.
If it receives an inactive input status, it does not make any changes (e.g. lights). This type of output can
only be controlled by buttons.
INVERTER
When the output receives a message from the input, regardless of whether it is an input active or inactive
message, it changes status (e.g. lights).
N .B . This type of output allows use of the bistable function if the command originates from
switches, diverters or inverters already present in the system instead of from buttons .
TIMED
When the output receives an input active status, it is in turn activated, starting a timer; when the set time
has elapsed, it is deactivated automatically. If it receives an inactive input status, it does not make any
changes (e.g. timed stair lights or boxes).
N .B . This type of output can only be controlled by buttons .
DIGITAL AND ANALOGUE INPUT OPERATING PRINCIPLE