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Valve outputs | Short-circuit and overload detection
setting. As soon as the actuator receives a "1" telegram via this object, all the
overload / short-circuit states will be reset immediately. The actuator then de-
activates the overload / short-circuit state of each valve output and also re-
tracts the overload / short-circuit signals. Should all or some of the valve out-
puts still be shorted or overloaded at this time, then a new identification phase
will begin.
A "0" telegram to the "Reset short-circuit / overload" object produces no reac-
tion.
The global resetting of an overload or a short-circuit during a testing cycle is
always ignored.
–
Resetting by switching off the valve voltage supply:
Overload / short-circuit states can be reset by switching off the valve voltage
supply. The following procedure is required for this:
a) Switch-off of the valve voltage supply. After this, the actuator immediately
transmits a signal telegram "Failure of operating voltage", provided that this
function is globally enabled in the ETS and the bus voltage is still switched on.
In addition, all the overload / short-circuit signals of the valve outputs are reset
immediately. If, at this time, no bus voltage is switched on, then the actuator
will reset the overload / short-circuit signals after the bus voltage is switched
on again.
b) Elimination of the cause of the overload / short-circuit
c) Switch-on of the valve voltage supply. The valves can then be activated
again normally. When the valve voltage supply is switched on, the actuator
also retracts the "Failure of operating voltage" signal, provided that this func-
tion is globally enabled in the ETS.
d) Should all or some of the valve outputs still be shorted or overloaded after
the return of the valve voltage supply, then a new identification phase will be-
gin.
Switching off the valve voltage during a testing cycle only causes a reset of ex-
isting overload / short-circuit signals. The testing cycle is not cancelled.
9.9.1 Short-circuit and overload detection parameters
Short-circuit / overload
The actuator is able to detect an overload or a short-circuit at the valve outputs and,
in consequence, to protect them against destruction. Outputs which have experi-
enced a short-circuit or a constant load are deactivated after an identification period.
In this case, a short-circuit or overload signal can be transmitted via a KNX commu-
nication object.
In the "yes" setting, this parameter enables the object "Short-circuit / overload -
Status".
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Checkbox (yes / no)
Page 104 of 257
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