Failure Of The Valve Operating Voltage - Gira KNX 2139 00 Product Documentation

Valve outputs | Channel-independent functions
Object no.
17
1-bit output object for status signalling of whether the service mode is active or not.
In this case, the telegram polarity is fixed: "0" = Service mode inactive,
"1" = Service mode active.
The object value is not transmitted automatically after a device reset (ETS program-
ming operation, bus voltage return).

9.3.6 Failure of the valve operating voltage

To activate the valve drives, the actuator requires a separate operating voltage sup-
ply (AC 24 V or AC 230 V). Valve outputs can only be electrically activated when the
valve operating voltage supply is switched on. If there is no valve voltage supply,
then the drives will move to their idle position (deenergised opened / closed). To pre-
vent a failure of the valve voltage supply at the actuator from going undetected, a 1-
bit fault signal can be optionally transmitted to the bus via the object "Failure of oper-
ating voltage". The telegram polarity of this fault signal can be configured.
If the actuator detects that there is no valve voltage, then the failure telegram
("Voltage failed") is transmitted immediately. Only when the valve voltage has been
reconnected will the actuator retract the fault signal ("Voltage available").
A valve which has been completely opened (deenergised opened) by the failure of
the valve operating voltage is not include in the determination of heat requirement or
the "Largest command value" and has no influence on the pump control.
Enabling the signal "Operating voltage status"
If the valve operating voltage failure signal is to be used, the parameter "Status" on
the parameter page "Valve outputs - General valve outputs" must first be activated.
This enables the parameter page "Status". The status of the operating voltage can be
activated there.
￭ Activate the checkbox. Configure the parameter "Object polarity" to the re-
quired telegram polarity.
The failure signal is enabled. The actuator actively transmits a "Voltage failed"
telegram when it detects a failed or switched-off valve voltage supply, when
the bus voltage supply is still switched on. The actuator transmits a "Voltage
available" telegram as soon as the valve voltage supply is available again and
the bus voltage is switched on.
￭ Deactivate the checkbox.
The failure signal is not available.
Setting the behaviour of the failure signal on bus voltage return
The object for the transmission of a failure of the valve operating voltage can actively
transmit the feedback information after a bus voltage return and an ETS program-
ming operation. As an option, it is possible to configure in the ETS whether active
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Function
Service mode status Service mode - out-
Name
put
Type DPT Flag
1-bit 1,002 C, R, -, T, -
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