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Valve outputs | forced position
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
forced position Summer/winter switch-over for valve outputs. It is also possible to
switch over the operating mode during an active forced position. In this case, the
value belonging to the operating mode is activated immediately after the switchover.
If no summer / winter switchover is planned in the actuator, then only a command
value can be configured in the ETS for the forced position.
For each valve output, the forced position is activated and deactivated via a separate
1-bit object. The telegram polarity can be configured. According to the priority control,
an active forced position can be overridden by other device functions with a higher
priority (e.g. service mode, manual operation). At the end of a higher priority function,
the actuator executes the forced reaction for the valve outputs concerned once again
if the forced position is still activated at this time.
Optionally, the command value of the forced position can also be activated in case of
bus voltage failure, after bus/mains voltage return or after an ETS programming oper-
ation. This is only the recall of the configured command value and not the activation
of the forced position as takes place via the 1-bit object.
The command value preset by an active forced position is also included in the
determination of heat requirement. In addition, the command value of the
forced position has an influence on the pump control.
At the end of a forced position, the behaviour of a valve output is permanently
defined. For the affected valve outputs, the actuator always tracks the state most re-
cently preset by functions with a lower priority (emergency operation) or by normal
bus operation (activation by command value telegrams).
After a device reset (bus voltage return, ETS programming operation), the
command value objects first contain the value "0".
Enabling the forced position object and configuring the forced position
For the forced position to be used as a locking function, it must first be enabled in the
ETS on the parameter page "VOx - General - Enabled functions". This switches the
parameter page "VOx - General - Forced position" to visible. The remaining paramet-
ers are set there.
￭
Set the parameter "Forced position controllable via object" to "yes". Define the
parameter "Object polarity" to the required telegram polarity. In addition, con-
figure the required command values (optional for summer and winter mode).
The forced position object is enabled. The affected valve output is locked by a
telegram according to the "Forced operation active" polarity at the defined
command value (optional according to the most recently preset operating
mode).
￭
Set the parameter "Forced position controllable via object" to "no".
The forced position object is not enabled. The forced position for locking the
valve output is not possible. Only the command values can be configured, so
that a state for the reset behaviour of the valve output can be optionally
defined.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Page 89 of 257
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