Gira CO2-Sensor, Руководство пользователя

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Order No. 2104 ..
- If the limiting value plus hysteresis is undershot, no telegram is transmitted and the cyclical
transmission is suppressed, too.
- If the limiting value is undershot again, an ON telegram is transmitted in turn and the cyclical
transmission of this ON telegram is reactivated, too.
Specifying limiting values via external objects
If the limiting values are to be adjustable and thus dynamically adaptable while the system is
running, then the parameter "External limiting value X" in the parameter node "limiting value X"
can be set to "Absolute value via 2-byte object" or "Percentage via 1-byte object". The
communication objects "S... Limiting value specification - Absolute value" (2-byte) or "S...
Limiting value specification - percentage" (1-byte) can, for instance, be linked to the value
transmitter objects of an external push-button.
i If the value specification is triggered by a push-button sensor, this push-button sensor
should be configured in such a way that it first transmits the configured value after a long
button-press (more than 3 seconds) in order to prevent operating errors.
Limiting value specification via teaching function
If the user should have the option to use the current measured value as a new limiting value
without knowing the numerical value himself, the parameter "External limiting value X" in the
parameter node "Limiting value X" can be set to "Store limiting value via switching object
(teaching)". Once the object "S... Limiting value specification - Learning" thus receives a
telegram with the value "1", the device applies the last measured value as new limiting value.
Telegrams with the value "0" are ignored.
i If the Teaching function is triggered by a push-button sensor, this push-button sensor
should be configured in such a way that it first transmits the value "1" after a long button-
press (more than 3 seconds) in order to prevent operating errors.
Setting limiting value specification via external objects or by means of teaching
Limiting value specification via an external object for the measured values "CO
2
" and "Humidity"
is set by means of the parameter "External limiting value X" on parameter node "Limiting value
X".
"n limiting values active" is set for the measured value on the parameter page "CO2
measurement" or "humidity measurement". There is a maximum of four (n = 1…4) limiting
values available for the CO
2
measured value, and a maximum of two (n = 1…2) for the humidity
measured value.
o In the input field "External limiting value X", select from the list whether the limiting value
specification should be set by "Absolute value via 2-byte object", by "Percentage via 1-byte
object" or by "Teaching".
i The set value overwrites the limiting value specification via parametrization until it is
overwritten by another external value.
i The externally predefined value is overwritten by the value configured in the ETS during an
ETS programming operation.
Switch-on and switch-off delay of the limiting values
All limiting values of the device can be given switch-on and switch-off delays. It should be noted
here that not only is the transmission affected on change of this delay, but the cyclical
transmission of the limiting value object, too.
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Software "KNX CO2 sensor"
Functional description