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Valve outputs | Valve output - General
Reset behaviour
After bus voltage return
After bus or mains voltage return, the valve outputs perform the configured reaction
at this point.
Specify command value: The actuator sets the command value preset in the ETS for
the valve output by the following parameter "Command value".
Activate command value according to forced position: For the valve output, the actu-
ator polls the command value preset for the forced position, as configured in the
ETS. Here, the active operating mode (summer / winter) is taken into account,
providing that a summer / winter change-over is configured.
Ensure that, in this setting, the forced position function is not executed! The actuator
only polls the command value preset for the forced position.
Activate command value according to emergency operation: For the valve output,
the actuator polls the emergency operation command value, as configured in the
ETS. Here, the active operating mode (summer / winter) is taken into account,
providing that a summer / winter change-over is configured.
Ensure that, in this setting, emergency operation is not executed (as would be the
case if there was a faulty command value found in the course of command value
monitoring)! The actuator only polls the command value preset for emergency oper-
ation.
Command value as before voltage failure: After bus or mains voltage return, that
command value is set at the valve output which was active at the moment of the last
bus voltage failure. If there is a bus voltage failure, the actuator saves the active
command value internally in the device, so that the command value can be restored
when the device power supply returns. Saving only takes place after a previous
device reset (ETS programming operation, bus voltage return) when the reset is
longer than 30 seconds previously. Otherwise the actuator does not save the current
command value! In that case, an old value remains valid, as was previously saved
by the actuator on the bus voltage failure.
Command value
The command value to be set on bus voltage return is defined here. This parameter
is only visible on "Behaviour after bus voltage return" = "Preset command value".
For valve outputs configured in the ETS to the command value data formats "Switch-
ing (1-bit)" or "Constant (1-byte) with command value limiting value", a constant
command value can also be preset using this parameter. In this case, a pulse width
modulation (5% ... 95%) is executed for the affected command value outputs. In the
"0%" and "100%" presettings, the valve outputs are activated continuously. The pre-
set PWM remains active until other functions have been executed or a new com-
mand value telegram is received via the bus, overriding the constant command
value on the valve output.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Specify command value
Activate command value acc. to forced
position
Activate command value acc. to emer-
gency operation
Command value as before voltage failure
0 % ... 100 %
Page 78 of 257
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