Libraries for Building Automation Function Block ... - Wago

Fan, 2-Level (FbFan_2Level)Time referenced behavior:SpeedLevelLevel 1Level 2Level 2 Level 1.tStartUpPeriod.tSwitchOverTimexLevel1xLevel2Function description:The FbFan_2Level function block controls and monitors a 2-level fan.Configuration parameters:The configuration structure "typConfigFan" contains the following parameters:• ".tOnDelay" defines the On-delay for the fan.• ".tStartUpPeriod" defines the runup time for the fan. During this time periodV-belt monitoring is not performed.• ".tSwitchOverTime" indicates the time the fan needs to switch over fromspeed level 2 to speed level 1. Both levels are deactivated in this state.• ".tPressureVariation" defines the response delay for V-belt monitoring.• ".xAuxiliaryContact" indicates whether a check-back signal from the powercontactor auxiliary contact is present.The fan is switched on the Automatic mode when the system has been enabled via"xEnableSystem" and the "xEnableFan" input has been activated.In the automatic mode you can specify the desired fan level via the “xSpeedLevel1“and “xSpeedLevel2“ inputs. If you select both fan levels, the fan remains in its lastvalid level.If level 2 is specified immediately during fan startup, the fan starts with level 1 andchanges to level 2 after the startup time has expired. At the same time, the runtimemonitoring is activated. If level 2 is specified immediately during fan startup, the fanstarts with level 1 and changes to level 2 after the startup time has expired. At thesame time, the runtime monitoring is activated.When night ventilation is enabled via the "xNightVentilation" input, the fan iscontrolled independently of "xEnableSystem" via the "xEnableFan" and"xSpeedLevel1" or "xSpeedLevel2" inputs.Manual override is activated via the "xManualOperation" input. During manualoverride, the fan is switched via the "xManualLevel1" and "xManualLevel2" inputs.The fan is controlled via the "xLevel1" and "xLevel2" outputs.Subject to design changes WAGO Kontakttechnik GmbH & Co. KG P:O. box 2880 • D-32385 Minden Phone: 05 71 / 8 87-0 E-Mail: info@wago.comCopyright © 2013 Hansastr. 27 • D-32423 Minden Fax.: +49 (0) 5 71 / 8 87-169 Web: http://www.wago.com44