SRV_BO_SMALL

SRV_BO_SMALL (FB)

FUNCTION_BLOCK SRV_BO_SMALL

Influence on the current state of the property 'PresentValue' (output)

Priority Condition Function Notes

Highest property 'OutOfService' = TRUE 'PresentValue' can be written directly Forced override of the output 'PresentValue'

Middle state of at least one priority The state of the highest priority (1 = highest, prioritization of requests for the state of PresentValue: of the array <> NULL 16 = lowest) of the array <> NULL determines the value of 'PresentValue'

Lowest states of all priorities 1 - 16 of the array On transition into this priority the value of the determination of the state of 'PresentValue', if there are no valid entries in the array := NULL the property 'RelinquishDefault' is written once to the output 'PresentValue'.

Notes:

The state of a priority of the array can take the following states: NULL (= inactive), FALSE (OFF), TRUE (ON) The most recent access defines the state of PresentValue. ('Last wins') Each new state of 'PresentValue' is transmitted only once when the state changes, there is no continuous transmission (= pulse function).

Priority 6

The state of priority 6 must not be used (= written), as it is used for pulse generation on state change of the property 'PresentValue'. Each rising edge on 'PresentValue' generates a pulse (state: TRUE) of length 'MinimumOnTime' ('MinimumOnTime' > 0 s) of priority 6. Each falling edge on 'PresentValue' generates a pulse (state: FALSE) of length 'MinimumOffTime' ('MinimumOffTime' > 0 s) of priority 6.

Notification Class

Conditions:

1. The property 'RecipientList' must be provided with the attribute 'WRITEABLE'.

2. The instance number must be identical to the Notification Class

3. The priorities (0 - 2) should contain values greater than 0 (e.g. all = 1)

Persistence

Conditions:

1. The desired property (e.g. 'Description') must be provided with the attribute 'PERSIST'.

2. Persistence remains until the value of the property changes (xEnValueChange = TRUE) and/or a rising edge is detected at the input 'xInit'.

Unsolicited COV (= unsolicited transmission of state changes to all BACnet participants (broadcast))

Conditions:

1. The property 'SupportUnsolicitedCOV' must be set to 'TRUE' in the BACnet_Server (central for all BACnet objects)

InOut:

Scope	Name	Type	Initial	Comment
Input	itfMasterConnector	IMasterForServerObjectsPOU		Input for the interface of the FB ‘MasterForServerObjectsPOU’
Input	xInit	BOOL	FALSE	Reassignment of all properties (write values/states and update outputs) (on every rising edge)
Input	xPresentValue_IN	BOOL	FALSE	Set the state of the output ‘xPresentValue’ with the priority ‘diPriority_IN’
Input	udiObjectInstance	UDINT	1	Object instance of the server object to be created
Input	sObjectNamePrefix	STRING(254)	‘’	Optional prefix for forming the object name — CONCAT(sObjectNamePrefix,sObjectNameText)
Input	sDescriptionPrefix	STRING(254)	‘’	Optional prefix for forming the description — CONCAT(sDescriptionPrefix,sDescriptionText)
Output	eObjectTypeFb	BACnet.CmpBACnet.IEC_BACNET_OBJECT_TYPE		Type of the object — feedback
Output	udiObjectInstanceFb	UDINT		Object instance of the server object to be created — feedback
Output	xPresentValue	BOOL		Value of ‘Present-Value’ (Relinquish-default: S / Priority array: S+C / Out-Of-Service: S)
Output	xPresentValueOverride	BOOL		Status of the override of the output ‘xPresentValue’ (TRUE = override active)
Output	stProperties	SRV_BO_SMALL_PROPERTY_OUTPUTS		Structure with the current states of selected properties
Output	xRegistered	BOOL	FALSE	Indicates successful registration of the server object
Input Const	eSelectPopertiesToCheckChanges	ServerObjects_Select_Properties_To_Check_Changes	ServerObjects_Select_Properties_To_Check_Changes.PresentValue_only	Selection of properties to be continuously checked for changes on the input (index ‘_IN’) and, if necessary, changed in the server 1. ServerObjects_Select_Properties_To_Check_Changes.No_property: No property is checked 2. ServerObjects_Select_Properties_To_Check_Changes.PresentValue_only: Only the properties ‘PresentValue’ (input ‘xPresentValue_IN’) and ‘Reliability’ (input ‘eReliability_IN’) are checked 3. ServerObjects_Select_Properties_To_Check_Changes.All_properties All properties (inputs with the index ‘_IN’) are checked
Input Const	eTriggeringUpdateActual	ServerObjects_TriggeringUpdateActual	ServerObjects_TriggeringUpdateActual.CENTRAL_TRIGGERING	Definition of the trigger for cyclical updating of the outputs NO_TRIGGERING: no cyclical update LOCAL_TRIGGERING: cyclical update (time duration: tTimeUpdateActual) CENTRAL_TRIGGERING: cyclical update (time duration dependent on the number of server objects)
Input Const	tTimeUpdateActual	TIME	TIME#3s0ms	Update interval for updating the outputs
Input Const	eAccessRightEventDetectionEnable_IN	BACnet.CmpBACnet.IEC_BACNET_ACCESS	BACnet.CmpBACnet.IEC_BACNET_ACCESS.BACNET_ACCESS_HIDDEN	Definition of the access right for the property 'Event Detection Enable' by a client
Input Const	eAccessRightEventEnable_IN	BACnet.CmpBACnet.IEC_BACNET_ACCESS	BACnet.CmpBACnet.IEC_BACNET_ACCESS.BACNET_ACCESS_HIDDEN	Definition of the access right for the property 'Event Enable' by a client
Input Const	eAccessRightNotificationType_IN	BACnet.CmpBACnet.IEC_BACNET_ACCESS	BACnet.CmpBACnet.IEC_BACNET_ACCESS.BACNET_ACCESS_HIDDEN	Definition of the access right for the Notification Type by a client
Input Const	eAccessRightTimeDelay_IN	BACnet.CmpBACnet.IEC_BACNET_ACCESS	BACnet.CmpBACnet.IEC_BACNET_ACCESS.BACNET_ACCESS_HIDDEN	Definition of the access right for the time delay by a client
Input Const	eAccessRightNotificationClass_IN	BACnet.CmpBACnet.IEC_BACNET_ACCESS	BACnet.CmpBACnet.IEC_BACNET_ACCESS.BACNET_ACCESS_HIDDEN	Definition of the access right for the Notification Class by a client
Input Const	xRelinquishDefault_IN	BOOL	FALSE	Definition of the state of the output ‘xPresentValue’ if the priority array is not populated
Input Const	diPriority_IN	DINT	16	Priority for the state at the input ‘xPresentValue_IN’ (0 - 16, 0 = none, 1 = highest, 16 = lowest)
Input Const	ePolarity_IN	BACnet.CmpBACnet.IEC_BACNET_POLARITY	BACnet.CmpBACnet.IEC_BACNET_POLARITY.POLARITY_NORMAL	Definition of the signal polarity at the output in relation to the input ‘xPresentValue_IN’ NORMAL: 0 = Inactive, 1 = Active REVERSE: 0 = Active, 1 = Inactive
Input Const	eReliability_IN	BACnet.CmpBACnet.IEC_BACNET_RELIABILITY	BACnet.CmpBACnet.IEC_BACNET_RELIABILITY.RELIABILITY_NO_FAULT_DETECTED	Definition of the current state of the property ‘Reliability’
Input Const	xFeedbackValue_IN	BOOL	FALSE	State of the feedback of ‘xPresentValue’
Input Const	sActiveText_IN	STRING	‘On’	State text for the state ‘TRUE’ on the output ‘xPresentValue’
Input Const	sInactiveText_IN	STRING	‘Off’	State text for the state ‘FALSE’ on the output ‘xPresentValue’
Input Const	xOutOfService_IN	BOOL	FALSE	Forced override for the output ‘xPresentValue’ with the highest priority (‘xOutOfService’ = TRUE) (only for value objects)
Input Const	udiMinOffTime_IN	UDINT	0	Duration of the pulse in seconds (state: FALSE) (‘udiMinOffTime’ > 0 s) of priority 6, once at the state change from TRUE to FALSE
Input Const	udiMinOnTime_IN	UDINT	0	Duration of the pulse in seconds (state: TRUE) (‘udiMinOnTime’ > 0 s) of priority 6, once at the state change from FALSE to TRUE
Input Const	xEventDetectionEnable_IN	BOOL	FALSE	General enable/disable of event detection (TRUE = enable)
Input Const	xEventNormalEnable_IN	BOOL	FALSE	Enable/disable detection of transitions to the state 'Normal' (TRUE = enable)
Input Const	xEventFaultEnable_IN	BOOL	FALSE	Enable/disable detection of transitions to the state 'Fault' (TRUE = enable)
Input Const	xEventOffNormalEnable_IN	BOOL	FALSE	Enable/disable detection of transitions to the state 'Off-Normal' (TRUE = enable)
Input Const	eNotificationType_IN	BACnet.CmpBACnet.IEC_BACNET_NOTIFY_TYPE	BACnet.CmpBACnet.IEC_BACNET_NOTIFY_TYPE.NOTIFY_TYPE_ALARM	Definition of the type of the associated Notification Class
Input Const	udiTimeDelay_IN	UDINT	0	Definition of the value of the property ‘udiTimeDelay’ in seconds
Input Const	udiNotificationClass_IN	UDINT	40	Definition of the number of the associated Notification Class
Input Const	sDescriptionText	STRING(254)	‘’	Text part of the description
Input Const	sObjectNameText	STRING(254)	‘’	Text part of the object name of the server object to be created
Input Const	xEn	BOOL	TRUE	Enable / disable communication ( TRUE = enabled )