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ABB i-bus KNX
© 2010 ABB STOTZ-KONTAKT GmbH
Commissioning
Note
During a fault (emergency operation) when the control signal from the
thermostat is no longer received, the Fan Coil Actuator autonomously
performs a
Pulse width modulation –
(Pulse width modulation
the Fan Coil Actuator uses the programmable PWM cycle time
With option yes in parameter Monitoring control values, e.g. thermostat,
further parameters appear:
Monitoring time
in s [30...65,535]
Options:
30...120...65,535
With this parameter, the time is set for which all telegrams on the
input/setting values of the FCA/S are monitored: Communication
objects Control value HEATING, Control value COOLING or Control
value HEATING/COOLING.
If a setting variable is not received within the parameterised time,
a communication malfunction has occurred and emergency operation
is activated.
Important
It must be assured that the monitoring time is set to at least factor 3
larger than the set sending time of the thermostat.
The reaction of the FCA/S to a setting value not received can be
defined in the following parameters.
Send object value\
(Object "Control value fault" 1 bit)
Options:
no, update only
after a change
after request
after a change or request
no, update only: The status is updated but not sent.
after a change: The status is sent after a change.
after request: The status is sent after a request.
after a change or request: The status is sent after a change
or a request.
Control value after control fault
in [0...100] %
Options:
0...30...100
This control value in percent can be set with a control value fault
should the control fail (emergency operation).
Calculation, page 144,
(PWM), page 142). For this purpose,
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