Busch-Watchdog presence detector Type: 6131-74-101

ABB i-bus ® EIBBusch-Watchdog presence detectorType: 6131-74-101Switch Dim Cyclic HVAC MonitoringBright. control /1Selection in ETS2– ABBPhys. SensorsPresence detectorThe application program is intendedfor the presence detector in connectionwith the switch/dim actuator FM.Note: The descriptions for– switch,– value,– cyclic,– setting of the channels,– brightness-dependent switching,– light source,–HVAC– and monitoringhave already been outlined in theapplication description for “SwitchValue Cyclic HVAC Monitoring”.The function of the switch/dim actuatorand constant brightness controller aredescribed in the following section.Switch/dim actuatorThe output can be switched on and offvia the 1 bit communication object“Output - Switching”. The samecommunication object also sends atelegram if the output modifies its statebecause e.g. the 4 bit object “Dimmer -Rel. dimming” or the 1 byte object“Dimmer - Brightness value” hasreceived a telegram. The transmit flagmust be set however.The brightness value which the switch/dim actuator uses when switching onis defined in the parameters. Ifrequired, it is possible to select aconstant value between 10%brightness and 100% brightness.With the 4 bit communication object“Dimmer - Rel. dimming”, theconnected luminaires can be dimmedin accordance with EIS 2. If theactuator is switched off, it can bedimmed on via the 4 bit object.With the 1 byte communication object“Dimmer - Brightness value”, one of256 brightness values in a rangebetween 0 = switched off and 255 = fullbrightness can be given to theconnected luminaire. The object canalso forward a modified brightnessvalue to other dimmers. To do so, thetransmit flag must be set. The setting“internal and external dimmer” sets thetransmit flag automatically.Constant brightnessThe constant brightness controller caninfluence one or several dimmingactuators. If only the switch/dimactuator FM, which is placed on thepresence detector, is used to controlthe brightness level, the setting“internal dimmer” should be selectedas the “Type of dimming actuator”. Ifseveral dimming actuators control thebrightness in the room, the selectionshould be modified to “internal andexternal dimmer”. In the latter setting,the current brightness value is sent viathe communication object “Dimmer -Brightness value”. It should be ensuredthat the dimming actuators that areused in this case have entered thesame group address for the brightnessobject. The dimming actuators must beoperated in slave mode. The setting iscarried out via the respective dimmerapplication.To avoid fluctuations in the brightnesslevel, the presence detector shouldrecord the exact area that isilluminated by the luminaires whichare controlled by the switch/dimactuator FM.The constant brightness controller canbe activated or deactivated at any timevia the EIB. The object “Constantbrightness controller - Activation” isused for this purpose. If a telegram withthe value “1” is received at this object,the constant brightness controller isswitched on. The controller is switchedoff when a telegram with the value “0”is sent to the object.If the constant brightness controllershould be switched on directly e.g. ondetection of movement, the objects“Movement - Telegr. switch” and“Constant brightness controller -Activation” should be linked togethervia a common group address.The switch/dim actuator is switched onvia the 1 bit object “Output - Switching”.The initial brightness value can be set.By default, the actuator switches onwith 50% brightness.The parameter “Speed of control”specifies the period that the controllerrequires to pass through the completedimming range. A constant level ofbrightness is more pleasing to thehuman eye. Rapid variations in thebrightness level are disruptive.May 2002 2 - 99