Gira KNX 2139 00 Product Documentation page 47

Valve outputs | Channel-independent functions
Enabling detection of an external pump control
Optionally, the actuator can evaluate an external telegram for pump control (e.g. from
another heating actuator). This allows the cascading of multiple actuators with pump
control.
The object must be enabled for an external pump control signal to be detected.
￭ Activate the checkbox "Detect external pump control via object".
The "Pump control - External" object is enabled. The local heating actuator
links the 1-bit telegram value of this object with the internal state of its own
pump control logically as OR and outputs the result of this link via the "Switch
pump" object.
￭ Deactivate the checkbox "Detect external pump control via object".
Recording of an external pump control signal is not possible. The actuator only
controls the pump itself.
Cyclical telegrams to the "Pump control - External" object with an identical
telegram polarity (ON -> ON, OFF -> OFF) cause no reaction.
After a device reset, there is no polling of the current status of the "Pump con-
trol - External" object. Only when a bus telegram is received does the actuator
take this status into account when controlling the pump.
Configuring the anti-sticking protection of the pump controller
If pump control is enabled, optional cyclical anti-sticking protection can prevent the
sticking of the pump, if it has not been switched on by the command value evaluation
for a longer period of time. The anti-sticking protection must first be enabled on the
parameter page "Pump control" so it is executed during actuator operation.
￭ Activate the checkbox. In addition, define the interval of the protection function
in the parameter "Cyclical switching on". Configure the parameter "Switch-on
time" to the required length of the pump run.
Anti-sticking protection is activated. If the pump is not switched on at least
once during the set time by the pump controller, then the actuator will execute
anti-sticking protection, if necessary on a regular basis. The actuator then
switches the pump on for the preset switch-on time.
￭ Deactivate checkbox.
Anti-sticking protection is deactivated.
Once started, the anti-sticking protection always runs through to the end. It
cannot be cancelled prematurely through the reception of new command val-
ues and the resulting restart of the cycle time.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100 Page 47 of 257