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Valve outputs | Channel-independent functions
Object no.
8
1-byte output object for transmission of the largest constant command value of the
heating actuator to another bus device (e.g. suitable calorific furnaces with integ-
rated KNX controller or visualisation). The heating actuator evaluates all the active
1-byte command values of the valve outputs and, optionally, the externally received
largest command value (object 9) and transmits the largest command value via this
object.
In the case of valve outputs configured in the ETS to the command value data
formats "Switching (1-bit)" or "Constant (1-byte) with command value limiting value",
there is no evaluation of the command values preset via the bus. Exception: It may
also occur with such command value outputs that a constant command value is act-
ive (e.g. after bus/mains voltage return or a forced position and emergency operation
or manual operation). In this case, this constant command value is also included in
the calculation of the largest command value until the named functions with a higher
priority are exited or a new command value telegram is received via the bus, overrid-
ing the constant command value at the valve output.
After bus voltage return and an ETS programming operation, the actuator transmits
the current value of the largest command value without a delay, providing that auto-
matic transmission on change is configured. After a full device reset, the actuator
does not transmit automatically, when all the command values are set to 0%.
After a device reset, the actuator immediately starts the time for cyclical transmission
(if configured), so that the object value effective after the reset is transmitted cyclic-
ally.
Function: Evaluation of the largest command value
Object no.
9
1-bit input object for the cascading of multiple actuators with evaluation of the largest
constant command value. The transmitting object of a largest command value of an-
other heating actuator can be connected to this object. The local heating actuator
monitors the external telegram with its own active constant command values and
outputs the largest of all command values via object 8.
Cyclical telegrams to this object with the same value cause no reaction. After a
device reset, there is no polling of the current status of this object. Only when a bus
telegram is received does the actuator take this status into account during evalu-
ation.
9.3.4 Summer / winter mode switchover
The actuator possesses a summer / winter switchover. Depending on the season,
this allows the setting of different command value setpoints for a valve output for
emergency operation or forced position. Summer or winter mode is directly preset by
the 1-bit communication object "Summer / winter switchover". The telegram polarity
can be configured in the ETS.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Function
Largest command
value - Status
Function
Largest command
value - External
Name
General valve out-
puts - Output
Name
General valve out-
puts - Input
Type
DPT
Flag
1 bytes 5,001
C, R, -, T, -
Type
DPT
Flag
1 bytes 5,001
C, (R), W, -,
-
Page 54 of 257
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